Hey all,
Can you toss some common grounding issues at me. I have a 92 Z conv. I'm trying to refresh with parts from a wrecked 91 RS conv. Since I have a parts car in such good shape I bought an 87 IROC to refresh as well. The MAF wire connector is boogered & unpluged, the radio was not a good install & I've removed it. Fully charged, the batt. drains under 24 hrs. I keep it discon now unless working on the issues.
Anything that would help find my short?

 

A power distribution schematic from a helm manual. Purchase a helm manual. It will pay for itself. Trust me. There's like eight or nine pages of power and eight or nine more of ground in my manual.

You can always check voltage drop over each circuit to see where you're losing power.

 

You might try the poor man's method, I had a similar problem with my truck when I bought it, turned out the OEM radio was killing the battery. Pull all of the fuses from the panel under the dash. Disconnect the positive battery terminal. Then, connect one fuse at a time, and check the current draw between the battery positive terminal and positive cable. I found that my OEM radio was drawing a surprising amount of power, even when turned off. You'll have to be careful though, most volt meters only hold up to 10 or 20 amps, it should be printed somewhere on the front. For this reason, I don't recommend trying this method for high current stuff like the fuel pump, ECM, etc. Also, you can probably skip checking the items that only have power when the ignition is on, like power windows, A/C stuff, etc. There aren't a whole lot of items that have a constant power source.

 

You can place your multimeter in the fuse holder, and see if there's any amp draw between the two spots as well. Makes it nice and easy. There are some draws that don't have fuses in the fuse panel though.

 

Lol, leave it to me to overcomplicate things. I didn't even think to check current draw across the fuse terminals, that's way easier.