How did my high beams kill my ignition? |
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How did my high beams kill my ignition? |
87m491 |
Sep 14 2023, 05:31 PM
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#1
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Member Group: Members Posts: 295 Joined: 29-July 12 From: Portland, the original! Member No.: 14,731 Region Association: North East States |
After doing some bottom side work on my car last weekend (on ramps), and some dash bulb replacements, I went back topside to drive off the ramps (12 hours later) and absolutely no signs of life when ignition key is turned. No generator light, no oil light nada and of course no cranking. No fuses were blown. While the ignition switch hadn't exhibited symptoms of failing I figured I'd swap it out with a spare I had.
I swapped in the spare today. A bit of PITA so I went down an electrical check list before fully buttoning it up. Key on, dash lights check (generator and oil pressure, still stock incandescent bulbs) . Cranked over and instant start, check. Installed the directional and wiper switch stalk so I can check the functioning turn signals, check. All the illumination LEDs I installed in the gauges this week, check. Running lights, check. Headlights up and check. High beams to check high beam LED, saw the high beam indicator light, heard a relay, click, momentary check, then the dash went dark! Again, no fuses blown. Now I am back to the symptoms that led me to think it was the ignition switch. No lights at all on the dash with key on and of course no cranking. Hazards work, 1st position headlight switch items, gauge illumination works, 2nd position headlights do not and fogs do not. Data point, all of these items worked before the day before my first "dead electrical' experience last weekend. All wiring that I know of is stock. Looks like 'll be getting friendly with my multimeter once the coming storm passes through the northeast. Ideas BTDTs welcome. |
Superhawk996 |
Sep 15 2023, 11:41 AM
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#2
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914 Guru Group: Members Posts: 6,469 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
Grounds
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87m491 |
Sep 15 2023, 05:58 PM
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#3
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Member Group: Members Posts: 295 Joined: 29-July 12 From: Portland, the original! Member No.: 14,731 Region Association: North East States |
Grounds An all encompassing response that is simultaneously so broad that it my actually point to a solution or be void of any real utility. While I have a very hard time understanding schematics, I'm pretty sure the ignition switch houses no grounds. I think the generator and oil pressure idiot lights have different grounds for each and I know the headlight motors and starter certainly do. The likelihood of each of those simultaneously failing during the same 10 second interval have to be pretty high yet the occurrence would have one believe they are somehow daisy chained. "Grounds" will certainly be part of the investigative process. |
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