Cadillac STS Forum - 2005 through 2012 Discussion, No start no crank in Past Cadillac Vehicle Discussion; I have a 2005 Cadillac STS with a v6 keyless entry it will not start or crank with the remote ...
I have a 2005 Cadillac STS with a v6 keyless entry it will not start or crank with the remote or the starter button on the dash .I hit the start button and everything goes black for 20 seconds then the hole dash comes back ON. I pulled the starter button out of the dash to check for voltage at the back side of the button there are ten wires plugged in to it a light/blue with a white strip it had 13.5 battery voltage I pushed the starter button and the voltage dropped to 4.75 at the light/blue wires and 4.75 on the output side. The Light/Blue with White strip wire to the starter button can anybody tell me what voltage is at the starter switch and where that wire gets its power from. I need help thanks
It's also possible that you have a bad ground from the back of the engine to the battery. That guy wiggled loose on me, and i had exactly the same symptoms.
If the dash is going black, that means the ECU is attempting to start the car, which means the button is working fine. You've got something else going on further down the chain. Either a bad ground, a bad battery, a bad starter, or a bad starter solenoid. You could also have a bad starter relay. I'd start at the relay and then work from there with a meter and see where you're losing power.