Working on the wiring harness. Have heard that even on new harnesses, the wires can be labeled incorrectly. But removed all the individual bundles to re-directed to the AD locations and checked continuity of all switches. Have a replacement ignition switch coming to replace the defective new one that tested on when the tumbler was out. Then would go open with the key in and on. ugh. So I checked the heater switch. Are these suppose to be wired to the ground leg of the blower? In the off position, I have direct zero ohm continuity from the terminal in the 7 o'clock position to the dash clamp always. None to the 3 o'clock terminal. In 1st on position, .4 ohm between 3 o'clock and 7 o'clock, and 5.2 ohms from 3 and clamp. Next is 2 ohms between 3 and 7, and 6.7 ohms from 3 to clamp. Finally from 3 to 7 is 3.5 ohms, and 3 to clamp is 8.6 ohms. It's a good thing I'm checking all this stuff. I cannot find the box or instructions, and can't find anything in the inter web either, being this wasn't factory. I've found pages with the layout of the firewall and fan and switch locations, but no wiring diagrams or references to ground connections.
Chip
'Rusto-Mod' '51 Chevy 3600 5 window | C4 Corvette front/rear suspension & drivetrain | everything else looks old and stock '92 GMC Sonoma GT #15 of 806 '91 GMC Sonoma GT Extended cab 1 of 1 Trucks, Trucks.....and more Trucks
