Im having some electrical issues. When I get in my car my door lights come on, everything ok so far, then when I try to crank it. I get a whining noise and all the electricals cut off. Then none of my electronic works at ALL. No door lights, no headlights, no nothing. I leave it over night, get in my car again. All the interior lights work, then I tried to turn on my headlights. The whole car dies again. This is a brand new battery. What could be the problem?
Help me get my car running!
- Thread starter Tearlessj
- Start date
I am guessing it worked before the new battery?? What type of battery did you buy?
I will guess a Bad ground or you bought a bad battery.
I will guess a Bad ground or you bought a bad battery.
Say what? You'd better have a big ass ground to the engine block or it's going to get interesting when the 200+ amps of starter current tries to find another way back to that chassis ground. I won't even go into all the other problems you can have without a block ground.
Tearlessj said:
Based on what you wrote it's not working because of bad connections in the battery circuit, one of which is the missing block ground. You may have already slightly cooked something. On most cars the engine is usually on elastomeric mounts. Same with the tranny and suspension. Starter current has to get back to the battery negative somehow and when it can't do it through the block it'll find some other way. I've seen fried U joint bearings, throttle cables, linkages, on and on. It all depends on what provides the "easiest" path and such damage is always indicative of a bad block ground.
Not to mention the ECU and injector grounds in this car are on the intake manifold. Even then the Supra has suck grounding in a few places. The igniter for example. I daisy chain the ECU grounds to the igniter and then to the fender ground that leads directly back to the battery negative. I also run a wire from one of the O2 sensor mounting studs to the right side head/firewall ground that's already on the car. The O2 sensor signal is tiny enough without having it return through a mess of corroded exhaust components. It's why later O2 sensors are four wire.