No crank no start

FROSTY2016

MEMBER
1980 CHEVROLET BLAZER
5.7L
V8
4WD
AUTOMATIC
30,000 MILES

Truck has been sitting for a while, but I get main power to the starter but the exciter wire isn't getting power. Neutral safety switch is new and ignition checks out good.

Thursday, September 17th, 2020 AT 5:55 PM

6 Replies

JACOBANDNICKOLAS

MECHANIC
109,901 POSTS

Hi,

When you say exciter wire, are you referring to the smaller wire on the starter attached to the S terminal? It should only have power with the key in the start position. Have you checked it that way? Have you checked to confirm power to the neutral safety switch and out from it?

Have you checked fuses? Have you checked the starter relay?

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

I'm sorry, but I have no schematics for this model year. I'll do my best to help, but it is from memory, so bear with me. LOL

Let me know.

Joe

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Saturday, January 30th, 2021 AT 9:50 AM

FROSTY2016

MEMBER
4 POSTS

I did test the exciter wire while trying to start the vehicle it didn't have power. I haven't confirmed that power is coming out of the neutral safety switch but I know it's going in it was replaced recently though.

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Saturday, January 30th, 2021 AT 9:50 AM

FROSTY2016

MEMBER
4 POSTS

This vehicle doesn't have very many fuses I did check them though and no relays as far as I know.

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Saturday, January 30th, 2021 AT 9:50 AM

JACOBANDNICKOLAS

MECHANIC
109,901 POSTS

Okay, there may not be a relay. We need to work backwards to see where power is lost. That takes us to the neutral safety switch. Confirm there is both power to it and out when the key is on.

Let me know.

Joe

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Saturday, January 30th, 2021 AT 9:50 AM

FROSTY2016

MEMBER
4 POSTS

Okay, I got it running yesterday I ohmed out the wires from the starter to the neutral safety switch and didn't find any breaks. I then found the ignition switch which on this model is installed on top of the steering column separate from the key and bench tested that no issues. But when I reinstalled it I must of moved it in the right spot because I got it to fire right up I did end up replacing the battery due to it being drained and charged a few times. Thanks for the help I appreciate it.