I replaced the oil pan gasket, valve cover casked on pass...
Responses
Nachum Wagschal
255 days ago
Good afternoon
Would you like a wiring diagram , you will need to check where you are losing power going to the starter
Nachum Wagschal
255 days ago
Take a look at this , keep in mind the starter fuse will only have power when cranking the engine
Customer
255 days ago
Ok, thanks. I will verify but it seems like an interlock not letting the car start when the ignition is cranked. The shift/gear indicator light is not on so it may not know it is in park.
Nachum Wagschal
255 days ago
It is very possible it can be from the car not thinking its in gear , the computer should send voltage on the yellow and black wire to the starter relay to close the circuit , if its not doing that , then we need to look at other things like the switch on the transmission .
Customer
255 days ago
I verified I have 12v on 87 of the starter relay.
Nachum Wagschal
255 days ago
is the starter fuse good ?
Customer
255 days ago
starter fuse is good. I don't get 12V on 86 of the starter relay when turning the ignition though.
Nachum Wagschal
255 days ago
If you have 12 volts on 87 the starter should be spinning
and you would have 12 volts at the 40 amp starter fuse .
Customer
255 days ago
Ok, it was actually 30 that had 12v. Like it should but I verified not getting 12v to 87 with ignition turned.
Nachum Wagschal
255 days ago
I would try messing with the wires on the park neutral switch on the transmission and see if you can get the shifter to light up , i'll send you the diagram for it.
If that was disconnected it may need to be replaced, i don't know why i have never plugged one back in and it worked
Customer
255 days ago
Ok, will do.
Nachum Wagschal
255 days ago
Good Luck , let me know if you need anything else
Customer
255 days ago
Ok, ill check the switch wires but I didn't touch anything there when I was working on it. I'll see if I can check continuity on wires from the TCM connection and the transmission side since I could have pinched the harness while I was changing the motor mounts. Not sure that would explain why so many other functions like [tail lights](/topics-tail-light-cadillac/), brake lights blinkers, dome lights, high beam lights etc are not working.
Nachum Wagschal
255 days ago
Here is the lighting diagram , it almost sounds like something is disconnected .
Customer
255 days ago
The only thing working in the BCM fuse panel seems to be the cooled seats. All fuses are good. Wondering if something more central is wrong like ECM? Is there a safe way to try to reset the ECM before I attempt troubleshooting any further?
Nachum Wagschal
255 days ago
Look at this , i would think its a fusible link
Customer
255 days ago
I did not find any issues with any of the relays or fuses in the underwood fuse compartment. All have 12v. Also, all the symptoms are not common to one module. How do I troubleshoot each module? Do you have pin outs?
Nachum Wagschal
255 days ago
The wiring diagrams all have numbers on the wires and if you look close enough at the connectors there will usually be the first and last numbers of the wires.
Thats why i sent the power distribution diagram , you may possibly see them all receiving power from the same place
Customer
255 days ago
Ok, I will spend some time tracing wires today but I did notice if I remove the fuse for BCM, TCM or ECM the systems are the same as I have. No change. The radio, instrument cluster light up and a few other functions when the key is turned to accessory on but no shift indicator and no start when turning the ignition to start position. I can hear each module powered back on when the fuse is re-installed.
Nachum Wagschal
255 days ago
i would print off and study the power distribution and just start checking and crossing things off
Customer
255 days ago
Ok
Nachum Wagschal
255 days ago
Did you figure anything out ?
Customer
255 days ago
No comm from BCM. Had it towed to shop and they say the module needs to be replaced. Quote for $1000 for the part and then programming to VIN. They said it may have other issues but need to fix that first. I am considering ordering a remanufactured BCU pre programmed to my VIN for $195 to fix myself.
Nachum Wagschal
255 days ago
I would try the $195 one ,there are also places that you can send yours out to be repaired , i don't know which would be cheaper
Customer
255 days ago
Ok, thanks for the recommendation. I am thinking it's worth a try. I don't feel comfortable forking out $1000 plus programming fees to find out the root cause is a different module. $200 not so bad.
Nachum Wagschal
255 days ago
I feel the same way
Customer
255 days ago
Thanks for your help on this issue! Definitely isn't an easy fix like blown fuse or harness disconnected
Nachum Wagschal
255 days ago
Hopefully it will be easy as unplugging a module and plugging a new one in
Customer
255 days ago
Hoping so!
Nachum Wagschal
255 days ago
me too
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I replaced the oil pan gasket, valve cover casked on passenger side and both motor mounts on my 2007 [escalade esv](/topics-escalade-esv/) and now it won't start. Verified starter is good but car does nothing when turning ignition...
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