Shorbagon

This is a little frustrating. I pulled the ECU which dropped the draw and I followed the wires with the diagram in the link above for c103. I put everything back together and the parasitic draw seams to be gone. I can't pin point what stopped the draw. I installed a new belt and tested the voltage when running. It tested at 14.5 volts. I expect this problem to come back and I will keep you posted. Thanks again for the great insight.

Thanks for the link. I will look through it. Great reference for future problems as well.

I pulled the ECU (Bendix) and hooked the alternator back up. With the ECU completely removed I'm down to 1.5 draw. From what I can tell C103 continues along the back engine bay wall and drops down through the firewall to the ECU. I opened up the ECU and everything looks visually good. What does the ECU control?

This is a good plan. I disconnected the alternator wires and it dropped to 3.0. Then I disconnected the wires in the attached images below (right passenger side engine bay). this dropped the output to 0.2!! Any idea what these connection go to? https://www.flickr.com/photos/shorb/shares/14Nj23

Sounds like your alternator is not working. That's was my first thought too. I was confident that the alternator was the issue. I pulled it inspected it and had it tested. The alternator is in good working order. The alternator wires were inspected as well. The 4.3 amp pull is now what seams to be the problem. I see the alternator wire runs to the ignition "relay" before heading to the battery. Could that cause this problem?

When the battery is fully charged it starts with no issue and will continue running until the battery is drained. What should I do to check the starter?

I picked up a 1989 Comanche Pioneer for $500 a few months ago and I'm loving this project. I'm having a parasitic draw issue. It's drawing 4.35 when everything is off. All fuses and relays have been tested with no success. Issue: electrical power loss and then engine stall. Battery tested and good. Alternator tested and good. Here's a list of what Ive completed. Gas tank and pump. Tail light wires spliced cleaned and reconnected. Ignition key cylinder replaced. Headlight switch replaced. Battery cables replaced. Spark plugs and wires replaced. Engine ground wire upgraded and replaced. Any suggestions for finding the issue?

Check this out. Lots of great work headed to the scrap. http://swmi.craigslist.org/cto/5328170142.html