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97 chevy blazer wont crank new battery new starter

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97 chevy blazer wont crank new battery new starter
Submitted: 8 years ago.Category: Chevy
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Answered in 7 minutes by:
7/2/2009
Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago
Randall C
Randall C, ASE Master Tech
Category: Chevy
Satisfied Customers: 13,145
Experience: ASE Master, L1, 32 years, Diagnostic / Electrical Specialist
Verified

Hello, welcome to JA. When you try to crank vehicle, do you hear any sounds?click, humm etc?

 

Do you own a 12 volt testlight?

 

lmk Thanks

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Customer reply replied 8 years ago
yes the i can hear the relays
Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago
Do you have a 12 volt testlight?
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Customer reply replied 8 years ago
no
Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago
In order to help, we need to probe a few items. If you have a voltmeter, that would work, or you may need to run out and get a testlight if possible. You can get one just about any store. LMK. Thanks
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Customer reply replied 8 years ago

i have a voltmeter hear

 

Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago
let me know if it can be set to 12 volts. Thanks
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Customer reply replied 8 years ago

im not sure. i have only used it to check voltage at the altinator so i think its already reading 12 volts

Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago
Ok, while i look up some wiring diagrams, go to truck and put the 2 leads on the battery posts again and be sure needledle goes tup or to 12 volts. LMK. I will then be back after i review a few diagrams for items to test. thanks
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Customer reply replied 8 years ago
i got 12.23 volts at the battery
Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago
great, everything is working. I will get with you very shortly to test a couple things.
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Customer reply replied 8 years ago
you call this fine but it wont crank and its driving me crazy
Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago

In the picture below, is the location for relay. It will be # XXXXX in the diagram. I need you to find relay. It will have a RED, PURPLE, BLACK and another wire going to it.

 

When you locate it, I need you to get someone to hold the key in "CRANK" position while you use your meter to see how many wires have 12 volts on them. (Pull the relay OUT and probe the femal terminals in the harness). LMK when you can

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Customer reply replied 8 years ago

what picture

 

Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago

Sorry

 

graphic

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Customer reply replied 8 years ago
2 are reading 11.9 and the other is reading 9.9
Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago

Ok, put the relay back in, Do same thing, Turn and hold key in the CRANK position and while doing that, back probe the PURPLE wire . LMK what you have.

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Customer reply replied 8 years ago
ok i dont know what i did but when i pluged every thing back in it started. now with that said it has been doing that for about a week i can go some place and when i come back out it wont start. this is the part thats driving me crazy
Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago

You did not indicate this in the question. You clearly were handling the starter relay and that is most likely where the problem is The starter is new and battery which basically leaves the relay. You handled it and must have jarred something to make it work. You need to replace the relay

 

 

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Customer reply replied 8 years ago
i have switched the relay with another one and i still get the same problem. i just put the starter and battery in today so i wasnt sure if that wass the problem
Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago
I am trying to help but now need to know what all you have relaced. In what order did you repalce these items.
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Customer reply replied 8 years ago

start battery relay and starter again

Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago
The only way i can help is to catch it in the act again. If you back probe the PURPLE wire at the relay next time no start and you have no power there. you either have a bad trabs selector or ignition switch or a wire that is not making good contact. I am sorryry but this is all I have.
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Customer reply replied 8 years ago
what is a trabs selector?
Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago
Is yours a manual trans or auto
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Customer reply replied 8 years ago

manual and i have it bypassed i also got it to act up and i got 17.5 at the purple wire

 

Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago

Unsure why 17 volts as battery is only 12 or so. When you get 17 volts on purple wire, does the battery read 17 volts?

 

If you have voltage on the purple wire and car does not crank, you have a wire problem . the purple wire goes directly to starter. Ther are no others, That wire is what cranks the car. So.. the battery cable to starter is not good or purple wire to starter is not good.

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Customer reply replied 8 years ago
ok i stripped some of the wire away and i got 7.2
Customer reply replied 8 years ago
if it would be easier you can call me my number is XXXXX
Chevy Mechanic: Randall C, ASE Master Tech replied 8 years ago
i can not view your number and we are prohibited from seeing it and calling. I am going to opt out. I have tried to help but sorry i could not
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Customer reply replied 8 years ago
ok thanks anyway
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Randall C
Randall C
Randall C, ASE Master Tech
Category: Chevy
Satisfied Customers: 13,145
13,145 Satisfied Customers
Experience: ASE Master, L1, 32 years, Diagnostic / Electrical Specialist

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