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AMEDEE
AMEDEE, CHEVY TECHNICIAN
Category: Chevy
Satisfied Customers: 25197
Experience:  ASE certified tech ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
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Howdy! Just put another motor in it. We can jumpstart & the

Customer Question

Howdy! Just put another motor in it. We can jumpstart & the motor will start, turn over & run but WONT start w/the key in the ignition. Plus the gauges will not register. Any ideas? Im thinking it may be a issue w/the security kill switch not reseting.
JA: Have you checked the battery, particularly the terminal connections? Are they corroded?
Customer: Battery new w/clean terminals..
JA: What is the model/year of your Chevy?
Customer: Chevy tahoe 2004
JA: Are you fixing your Tahoe yourself? What have you tried so far?
Customer: Yes, me & a mechanic friend of mine. We just replaced the motor & that is it.
JA: Anything else you want the mechanic to know before I connect you?
Customer: No. That is pretty much all.
Submitted: 4 months ago.
Category: Chevy
Expert:  AMEDEE replied 4 months ago.

Hello and welcome!

My name isCustomerand I can assist you with your question.

Expert:  AMEDEE replied 4 months ago.

Are you looking for some possible causes or would you like me to walk you through this diagnoses?

Customer: replied 4 months ago.
Lost internet access. What ever info u can provide would b greatly appreciated. What can u tell me?
Expert:  AMEDEE replied 4 months ago.

Hello and sorry for the delay! No problem. I will be happy to help.

Do you have a 4.8 or a 5.3 liter engine. I will pull a wiring diagram for you.

Customer: replied 4 months ago.
5.3. Sorry! The Colts game is on & we r loosing.
Expert:  AMEDEE replied 4 months ago.

Lol.. no problem.

I will list some possible causes and then explain how to test/diagnose.

Expert:  AMEDEE replied 4 months ago.

Park nuetral position switch

Bad/blown fuse

Starter relay

Wiring issue

Connection

faulty fuse block

Faulty PCM

Ignition switch

Customer: replied 4 months ago.
Gotcha. I got a pen & pad.
Expert:  AMEDEE replied 4 months ago.

But dont worry, they are not all very common. The Park nuetral position switch and starter relay are the most common to cause this condition.

Expert:  AMEDEE replied 4 months ago.

Here is how to diagnose it.

Expert:  AMEDEE replied 4 months ago.

Open the hood and located the starter fuse in the underhood junction block.

Remove the starter relay

Check for two powers and one ground going into the relay with the key in the CRANK position. This is checked on the female terminals where you would plug in the relay (but of course doing this with the relay removed).

Expert:  AMEDEE replied 4 months ago.

I will send over a wiring diagram for this circuit for your viewing pleasure. You can see where the powers come from to the relay and where the ground comes from going to the starter relay.

Expert:  AMEDEE replied 4 months ago.

Here is the diagram

Expert:  AMEDEE replied 4 months ago.
Expert:  AMEDEE replied 4 months ago.

The relay gets power from the IGN A fuse and the IGN E fuse after going through the PNP switch. The PCM supplies ground to the starter relay.

Expert:  AMEDEE replied 4 months ago.

I am glad I can help!

It has been a pleasure working with you. Please dont forget to honor your good faith deposit by rating my answer as "5 STAR SERVICE" for assisting you today.

Keep in mind, we can still continue this conversation at no further cost to you even after you rate my answer. Just reply back to me using this page and I will get it and get back to you ASAP!

Please let me know if you have any further questions.

Customer: replied 4 months ago.
38; this is also a remedy 4 my dash gauges not registering w/a new battery?
Expert:  AMEDEE replied 4 months ago.

The diagnoses will likley lead to one component that has failed causing both problems. For exmaple, a bad ignition switch could cause both this no crank condition and the "no gauges" issue.

Customer: replied 4 months ago.
Gotcha! I'll let u know what my results come out 2 b.
Expert:  AMEDEE replied 4 months ago.

Its likely the ignition switch has gone bad and or there is a major power loss issue to the starting circuit AND the instrument cluster causing both problems. YES, by running these steps and diagnosing the problem, it will lead you in the right direction.

I will be here for you the entire time if you have any further questions please feel free to reply back as I will be happy to help.