Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I have a 2005 Peterbilt 379 I am looking for a wiring
Good morning I have a 2005 Peterbilt 379 I am looking for a wiring diagram on the fan control. Fan appears to be running all the time. I supplied air straight to the fan clutch and the fan turns off. … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
I have a1995 379 series pete, one day my speedo temp, fuel
hello i have a1995 379 series pete, one day my speedo temp, fuel tach and volt gauges stopped working , found a blown fuse replaced fuse mile down the road it blows again now i have still no gauges an… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
3,893 satisfied customers
I have a 97 379 blows warm when idling. 3406 e 1997.
I have a 97 379 blows warm when idling JA: What's the make/model/year of your truck? Engine type? Customer: 3406 e 1997 JA: Are you fixing your truck yourself? What have you tried so far? Customer: ye… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
Ecm coolant sensor is reading 20 degrees higher than dash
ecm coolant sensor is reading 20 degrees higher than dash gauge. when dash gauge reaches 200 the hot water light comes on then few seconds later stop engine light. check with inferred temp and dash ga… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
I have a 1996 Peterbilt 379 the fuse for the tachometer
I have a 1996 Peterbilt 379 the fuse for the tachometer speedometer alternator and a few extra accessory gauges will blow as soon as you plug it in I'm not real sure how to locate where the short may … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
Cat man 2005 peterbilt C15 it be working fine and all of
Cat man 2005 peterbilt C15 it be working fine and all of sudden all electrical power shuts off, let it sit for an hour or 2 power com backs by itself and works for few days and it happens again. Batte… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
3,893 satisfied customers
3406 cat engine in 379 peterbilt needs rebuilt. was
3406 cat engine in 379 peterbilt needs rebuilt. was wondering if anyone can help me figure out which one i have because it does not appear to be the arriginal engine and all the plates are not on the … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
3,893 satisfied customers
I have a 1997 C7500, Cat 3116 engine, and the starter does
I have a 1997 C7500, Cat 3116 engine, and the starter does not turn over, not even click. I have dropped the starter out, and tested it by applying 12V to the terminals on the starter and then jumping… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
10,749 satisfied customers
On 1992 379 peterbilt is there a solinoid between start
on 1992 379 peterbilt is there a solinoid between start button and starter selinoid on starter? … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
3,893 satisfied customers
Have a 2004 peterbilt 379. There is voltage drop after it
have a 2004 peterbilt 379. There is voltage drop after it has been running for about 5 min with lights and cab equipment dimming or stopping. Engine continues to run. Replaced batteries and continues.… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
10,749 satisfied customers
Yesterday my speedometer, odometer, voltage gauge and
Yesterday my speedometer, odometer, voltage gauge and instrument light cluster stopped working. Checked fuses and relays in fuse box as well as relay directly behind gauges. Could not resolve the prob… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
10,749 satisfied customers
I have a 2000 379 Pete 3406 e model with a 72 pin ecm like
I have a 2000 379 Pete 3406 e model with a 72 pin ecm like a c15.66000 miles, my tachometer speedometer froze, amp gauge quit, fuel guage quit, truck dies but restarts...if you unblock ground on batte… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
10,749 satisfied customers
My 1996 379 I have no power when I turn key switch on, but
My 1996 379 I have no power when I turn key switch on, but I have all my lights batteries are charged. My volt meter was going from 13 volt down to below 10 volts gauge jumping back and forth. Now not… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
10,749 satisfied customers
Why is it, when I press the brake peddle or turn on ac fan
Why is it, when I press the brake peddle or turn on ac fan my volt meter drops to zero? Also sitting here with everything off including ign. switch it it keeps cycling?… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,738 satisfied customers
1999 peterbilt 379 with n14 cumminspush start button will
1999 peterbilt 379 with n14 cummins push start button will not always engage starter.sometimes you pust the start button and you can hear a click behind the dash but wont start,sometimes it will start… read more
Toby
Toby
Vocational, Technical or Trade Scho
107 satisfied customers
peterbilt 1990 379 day cab, 3406 ac problems, I have power
peterbilt 1990 379 day cab, 3406 b ac problems, I have power to dash switch through relay on fuse block, fan in cab turns on , blows ok. have power in to high pressure for ac fan switch for big motor,… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
10,749 satisfied customers
I have a 97 peterbilt 379 with a 3406e cat, for some reson
I have a 97 peterbilt 379 with a 3406e cat, for some reson my fuel tanks wont level, the other day, I still had 1/4 tank in the driver side, but the truck shut off while going down the road because th… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
3,893 satisfied customers
I'am working on a 2000 Peterbilt 378 Highway Truck. I shut
Hi, I'am working on a 2000 Peterbilt 378 Highway Truck. I shut the truck off now it won't turn over and start. The batteries are good, all the lights work.I have absolutely no ignition power on the ke… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
10,749 satisfied customers
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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.

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