No crank, no click, bypass relay no fix?

Tiny
MDW722111
  • MEMBER
  • 2007 CADILLAC SRX
  • V8
  • 4WD
  • AUTOMATIC
  • 100,000 MILES
Hi there, I have the car listed above that the ignition got stuck at the ACC stage and will pull out but off is not an option. I replaced the battery because after sitting for a while I reconnected, and it wouldn't click or turn over. When the battery was replaced, I tried to use a wire on the starter relay to which the car started cranking but was unable to turn over. Is there something else I might need to check before replacing the starter as that is what it sounds like to me?
Friday, July 29th, 2022 AT 8:02 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

If the starter turned over when you jumped the relay, it is good and doesn't need to be replaced. Do you still have the ignition key issue where it won't turn fully off?

I attached the wiring schematic below for the starting circuit as a reference. Since it cranked when you jumped the relay, that tells me the starter fuse is good. Have you checked the relay itself? Switch it with a different one in the box that has the same part number. If there isn't one, here is a link that explains how to test a relay:

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

Next, see if it starts when placed in neutral.

If nothing happens, then I need you to locate the 2-amp ignition switch fuse in the under-hood fuse box (see pic 3 for location). Confirm it is good. Also, make sure to confirm there is power to and from it. Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If everything checks good, there is a chance the problem is within the computer data lines or there is an issue with the ECM (engine control module) or the BCM (body control module). We will cross that bridge when needed.

Let me know what you find or if you have other questions.

Take care,

Joe

See pics below. Note: The schematic is only one page long. I had to cut it in half to make it readable for you. I did overlap the two so you can follow from one to the next.
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Friday, July 29th, 2022 AT 9:35 PM

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