Originally Posted by 1skylark
No corroded connections. How do I test for cunductivity? I'm new to this electrical stuff, I know how to check resistance and check for power and that's it. Lol. I can build a engine, and set up a differential but this is new.
When I was a tech, the owner of one of the shops I worked at was a master when it came to finding electrical problems. His two favorites were either something is not grounded correctly or something that is not supposed be grounded, is. In either case, electrical problems are a royal PITA if you are working without the benefit of a computer to test each circuit. Here's how to find something that is grounded that should not be, ie a short.
1. Powered volt ohm meter with pointed leads is a must have.
2. Complete wiring diagram is extremely helpful. It will show you which wires are supposed to be grounded and which are not.
1. Set the meter in Ohm position. Test it by touching the leads together, it should show power/continuity.
2. Disconnect the battery of the vehicle. You're not looking for power on anything at this point, so kill it all.
3. Disconnect one set of wires at the connector.
4. Insert one lead of your meter into a connector on the connector block.
5. Touch the other lead to an unpainted body surface and again to the engine block.
6. If the meter moves, you've found a wire that is grounded. This is where the wiring diagram comes in really handy.
7. If the meter does not move, keep testing all the other wires in the same manner until you are sure nothing is grounded that should not be. Then move on to the next connector, etc. Make sure you plug things back in before moving on to the next connector.
If there are no connectors your can get to, you can stick the point of the lead through the cover of the wire (this is why you need the pointed leads on the meter) but it should be avoided if you can.
Its time consuming and there are no short-cuts, at least not that I've ever been able to find. Knowing what harness goes where really helps though.