Pontiac

Pontiac Problems? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Pontiac

2000 pontiac montana: 3.4 Van is overheating..Cooling fans..AC

Customer Question
2000 pontiac montana 3.4 Van is...
2000 pontiac montana 3.4

Van is overheating. Cooling fans are not coming on. I turn on AC, neither fan comes on, 1 is supposed to when AC is turned on. Checked fuses for cool fan 1 and 2, both fuses are good. Checked wiring to fans from fuse box. Found the wire connector in between the fans was burnt. Rewired the wiring at the point. Could find nothing else. Opened up one of the mini-relays, #10 (pn3604) and tripped the relay myself. The RH fan came on (passenger side). I then tripped the #12 mini relay myself and the same fan came on. LH fan never came on. What now?
Submitted: 8 years ago.Category: Pontiac
Show More
Show Less
Ask Your Own Pontiac Question
Answered in 5 minutes by:
7/16/2009
Pontiac Mechanic: GM Tech (Cam), Pontiac Technician replied 8 years ago
GM Tech (Cam)
GM Tech (Cam), Pontiac Technician
Category: Pontiac
Satisfied Customers: 29,693
Experience: GM Grand Master Technician 2007. 14 years experience.
Verified
Welcome. There are 3 relays and 2 maxi fuses for the cooling fans on these vans, and looking at it, there is no simply way to trip the relays to get the left fan on as it runs through 2. I recommend that you run power and ground to the left motor manually to see if it runs. If not, that could be the cause. Also, is the check engine light on?
Ask Your Own Pontiac Question
Customer reply replied 8 years ago
The check engine light was on last night, I pushed the wrong button on by obd2 scanner and erased the error code, but the check engine light has not come back on. So you think possibly that the LH fan could be causing all the overheating problems? I just curious, but would that keep the RH fan from coming on.
Pontiac Mechanic: GM Tech (Cam), Pontiac Technician replied 8 years ago
IN low speed, they run together so it is very possible.
Ask Your Own Pontiac Question
Customer reply replied 8 years ago
I Not the shapest knife in the box, but whats a good way to run power and a ground to the LH fan to test it.
Pontiac Mechanic: GM Tech (Cam), Pontiac Technician replied 8 years ago
I would get 2 wires, one with a 20amp fuse, run one from the terminal in the receptacle of the motor to ground and the other to a power source.
Ask Your Own Pontiac Question
Customer reply replied 8 years ago
I replied way too soon last time. As soon as I replied I came up with a idea. But the other fan does work. what now?
Pontiac Mechanic: GM Tech (Cam), Pontiac Technician replied 8 years ago
The right fan is controlled by a single relay and that relay can make it run on its own or in series eith the other relay depending on the second relays. What was your idea?
Ask Your Own Pontiac Question
Customer reply replied 8 years ago
I switched the wiring around from rh fan to Lh fan, that was my big idea. Should I be possibly looking at the pcm or the other relay (3602) as maybe being the problem, I know at this point that the relays are not being tripped and both fans would work if they received power. So what do you think I should look at now.
Pontiac Mechanic: GM Tech (Cam), Pontiac Technician replied 8 years ago
OK, so you switched the harness around, did what you did before and the other fan ran?
Ask Your Own Pontiac Question
Customer reply replied 8 years ago
yes
Pontiac Mechanic: GM Tech (Cam), Pontiac Technician replied 8 years ago
OK, so the fans work, but what caused the wires to be damaged that you repaired? Is the wiring to the left fan motor all good? Before you spend the money on a PCM that may not even be bad, it may well worth your money to have a quick scan tool diagnosis done. With your overheating, does the dash show it is hot or is the coolant just boiling?
Ask Your Own Pontiac Question
Customer reply replied 8 years ago
Dash shows hot, now the van wont start at all.
Pontiac Mechanic: GM Tech (Cam), Pontiac Technician replied 8 years ago
Did it stall on its own or will is just start now? Does it crank over?
Ask Your Own Pontiac Question
Customer reply replied 8 years ago
It is starting now, fans still do not come on though
Pontiac Mechanic: GM Tech (Cam), Pontiac Technician replied 8 years ago

OK, I don't want to say this, but you need a scan tool to command the fans on and see if they respond to the PCM controls.

HERE is the cooling fan diagnosis.

Ask Your Own Pontiac Question
Customer reply replied 8 years ago
Fixed it!!!   I changed out the other mini relay #9 (3602). Bam! fans came on. The reason the van wouldnt start was I didnt have one of the relays down all the way. Thanks for your help. Is a scan tool different than a obd2 code reader?
Pontiac Mechanic: GM Tech (Cam), Pontiac Technician replied 8 years ago
A code reader is as the name suggests, it reads codes. Scan tools are bi directional and can command the pcm to perform functions and read the data from the data stream. They are also 2000-4000.
GM Tech (Cam)
GM Tech (Cam), Pontiac Technician
Category: Pontiac
Satisfied Customers: 29,693
Experience: GM Grand Master Technician 2007. 14 years experience.
Verified
GM Tech (Cam) and 87 other Pontiac Specialists are ready to help you
Ask your own question now
Customer reply replied 8 years ago
Thanks and have a nice day.
Pontiac Mechanic: GM Tech (Cam), Pontiac Technician replied 8 years ago

You are welcome. You can always reply to this post if you should need more information even after you accept.

Ask Your Own Pontiac Question
Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam)
GM Tech (Cam), Pontiac Technician
Category: Pontiac
Satisfied Customers: 29,693
29,693 Satisfied Customers
Experience: GM Grand Master Technician 2007. 14 years experience.

GM Tech (Cam) is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Pontiac Technician

29,693 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Dave Nova

Dave Nova

Pontiac Technician

2,014 satisfied customers

ASE Master Certification. GM World Class Certification

Gary

Gary

Pontiac Technician

1,436 satisfied customers

15 years GM master tech/15 years ASE master

Ron Z.

Ron Z.

- Pontiac Tech -

761 satisfied customers

18+yrs experience. State Inspector and Pontiac Diagnostics

Don - Mo Lurch

Don - Mo Lurch

Pontiac Mechanic

551 satisfied customers

GM, Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

John

John

GM FACTORY CERTIFIED TECHNICIAN

514 satisfied customers

ASE A1-A8 w/L1 GM master technician.Factory certified/40 years experience

car tech

car tech

ASE Certified Technician

446 satisfied customers

25 years master tech and shop owner

< Previous | Next >

Related Pontiac Questions
Hearing knocking in the engine of pontiac g6. Seem to be
Seem to be coming from around the dashboard and has been for a couple of weeks … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
My Pontiac grand am 2.2 litre ecotec has rough idle, loss of
My Pontiac grand am 2.2 litre ecotec has rough idle, loss of power when driving, slow acceleration, takes a lot longer to shift gears, increased fuel consumption and can smell unspent gas in exhaust f… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
Would you please tell me how to find Information for P1133
Would you please tell me how to find Information for P1133 Pontiac code? … read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
Got a 1970 gto need to know (pics) how to wire distributer.
got a 1970 gto need to know (pics) how to wire distributer. 400 ci. … read more
eurotec
eurotec
Vice President / Manager
Associate Degree
11 satisfied customers
My passenger side break light out. I replaced the bulb with
My passenger side break light burnt out. I replaced the bulb with success but now it only works when I press the break and not when I turn my lights on. All fuses are in working order and the driver s… read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
My seat latch for my 2009 g6 Pontiac drivers seat came
My seat latch for my 2009 g6 Pontiac drivers seat came off.now seat slides freely.how do I repair it … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
2008 Pontiac G6. 4 cylinder. Auto tranny. 83,000 miles. Turn
2008 Pontiac G6. 4 cylinder. Auto tranny. 83,000 miles. Turn signal indicator does not return to the neutral position (makes me feel like an old man who drives miles and miles with the signal on). Mak… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
No crank, No Start. Just a click. Battery tested good at
No crank, No Start. Just a click. Battery tested good at Auto Parts Store, car will not jump start. Replace both positive and ground battery cables with no change. Changed ignition relay as well. Mete… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
01 sunfire cranks but no fire. Tried starter fluid then
Yes tried starter fluid then realized its not getting fire … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,446 satisfied customers
I have a 2006 G6 that cranks but wont start. was running,
I have a 2006 G6 that cranks but wont start. was running, had had issues with starter, wouldn't crank even with a jump. replaced starter. now cranks but wont start. fuel pressure checks good. pulled c… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,429 satisfied customers
BOTH HEADLAMPS WENT OUT THE SAME TIME...HDLMP RELAY FINE...
BOTH HEADLAMPS WENT OUT THE SAME TIME...HDLMP RELAY FINE... … read more
Randall
Randall
Auto Technician / Consultant
Vocational, Technical or Trade Scho
69 satisfied customers
Top stopped working. 2006 pontiac G6 GT. FUSES
top stopped working JA: What is the model/year of your Pontiac? Customer: 2006 pontiac G6 GT JA: Are you fixing your G6 GT yourself? What have you tried so far? Customer: FUSES JA: Have you checked th… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
The blower motor keeps running after the car is turned off
The blower motor keeps running after the car is turned off and the key is taken out. It also makes a horrible grinding/vibrating sound. Looking for location of any resistor or relay that can be remove… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,429 satisfied customers
Locking system is ok. Door latch doesn't close on striker.
Locking system is ok. Door latch doesn't close on striker. Door doesn't stay closed. Do these get gummed up? If so can there be loosened up with some solvent or something?… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,446 satisfied customers
My fan stopped. Granprix 2005. Nothing yet. The fan would
my fan stopped JA: What is the model/year of your Pontiac? Customer: granprix 2005 JA: Are you fixing your vehicle yourself? What have you tried so far? Customer: nothing yet JA: Anything else you wan… read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
1998 sunfire will not turn over. Battery charged and all
1998 sunfire will not turn over. Battery charged and all accessories work feul pump working. Replaced clutch interlock switch under dash. Still not turning over. … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Coolant temperature gauge won't show correct heat level.
Coolant temperature gauge won't show correct heat level … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,429 satisfied customers
I have a 2008 Pontiac G6, 131,000 miles. Uses or leaks about
I have a 2008 Pontiac G6, 131,000 miles. Uses or leaks about a quart of oil every 750-1,00 miles. Has a slight transmission fluid leak, needs new shocks and struts. Have had some things replaced over … read more
Todd M
Todd M
Owner
ASE Certification
1,492 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x