A fun little project I've been tinkering with...
Several of my local friends with 80s have had trouble with the usual "click" rather than engine cranking when they turn the key. We've tried new starters, new contacts, new batteries, new IG switches, and all the things. Turns out at least 2 of the vehicles were experiencing significant voltage drop to the starter solenoid trigger wire, especially on a cold morning. Some down as low as 9VDC, which isn't enough oomph for the solenoid to engage and transfer the current between the contacts and make the starter spin the engine over.
l've encountered this for YEARS on various vehicles, and usually can remedy with the above-mentioned items, however these two proved to be persistent. While I think there is still opportunity to investigate the factory wiring and connectors further, I cooked up a way to put a relay in the system to effectively pass current straight from the battery to the starter when the relay is tripped. Even a paltry 9VDC is enough to whack a relay closed, and let the direct-path-to-the starter do the rest.
A bunch of googling, and several orders from chy-na later, I have the suitable connectors to make a plug and play harness. Thanks to some initial help from HuddExpo and sourcing the relays and pins from LutzAuto, it turned out looking pretty factory. I whipped one up for my vehicle, even though it was fine. We (Leland) also made one for
@lelandEOD, however he took his to the next level using a factory Diesel starter relay because he's got a diesel with a starter that makes more torque than the 22RE in my old mini truck, so he needed a man-sized relay. Anyway...on with the photos. My lame label is just for me to know what that bundle of wires does under the hood of the Black Hole.