67 Olds 442 Electrical Failure
#1
67 Olds 442 Electrical Failure
My 67 442 has suddenly lost all or most of its electrical power. Was working fine when I parked it last, then about a week later, nothing. The battery is fine and fully charged. I have power coming out of the horn relay and junction block. The horn will sound. No ignition, no headlights, interior lights etc. Fuses all appear ok. WHere should I look next?
#2
My 67 442 has suddenly lost all or most of its electrical power. Was working fine when I parked it last, then about a week later, nothing. The battery is fine and fully charged. I have power coming out of the horn relay and junction block. The horn will sound. No ignition, no headlights, interior lights etc. Fuses all appear ok. WHere should I look next?
#3
Check your ground wire(s). I'm not 100% certain of location(s) on a 1967, but you should see a large ground wire from the battery (-) negative terminal to the engine block. Remove the attachment point end of that ground wire, clean both the block area and the negative terminal well with a wire brush, etc., look for corrosion - it may have even come loose - then reattach. You might have a smaller ground wire from the battery (-) negative terminal to the chassis - often near the fan shroud, same thing - remove, examine, clean reattach. Check for a ground strap/wire from the rear of the engine which leads/mounts to the firewall - same routine.
#4
If the horn works, the body ground is probably fine.
I'd start at the ignition switch. I got a replacement pigtail from https://jcaparts.com/
I'd start at the ignition switch. I got a replacement pigtail from https://jcaparts.com/
#6
If the horn works, the body ground is probably fine.
I'd start at the ignition switch. I got a replacement pigtail from https://jcaparts.com/
I'd start at the ignition switch. I got a replacement pigtail from https://jcaparts.com/
#7
If the horn works, the body ground is probably fine.
I'd start at the ignition switch. I got a replacement pigtail from https://jcaparts.com/
I'd start at the ignition switch. I got a replacement pigtail from https://jcaparts.com/
#9
I've never seen an ignition switch just stop working. Usually when you jiggle them a little they work....for a while. There are a lot of things that can cause what you're describing. If you have the mechanical ability, the first thing I'd do is get a good 68 wiring diagram (I can email you one if you send me your email address). Probably half the time I've seen the whole dash die, it's the chassis ground. If you don't have tail lights, that's a good indication the chassis ground is bad too.
Good luck,
Last edited by allyolds68; October 19th, 2023 at 07:26 AM.
#10
Mike - We have a 1968 wiring diagram but the OP has a 1967 - are they the same?
1968 A body wiring diagram
1968 A body wiring diagram
#11
Mike - We have a 1968 wiring diagram but the OP has a 1967 - are they the same?
1968 A body wiring diagram
1968 A body wiring diagram
Last edited by allyolds68; October 19th, 2023 at 07:30 AM.
#13
The ignition switch has nothing to do with the headlight operation. As stated above, do some troubleshooting and see where the power drops off the main feed. You can use the 68 wiring diagram as a general reference, just note there is no fusible link feeding the cabin power on a 67.
Last edited by oldcutlass; October 19th, 2023 at 09:15 AM.
#15
I did, in fact, have a loose socket on my ignition switch which caused intermittent wiper and turn signals and did get the pigtail from Jurassic.
Last edited by fleming442; October 19th, 2023 at 09:20 AM.
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