ignition switch ground to body - Team Camaro Tech
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post #1 of 4 (permalink) Old Dec 3rd, 15, 06:52 PM Thread Starter
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Frank
 
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ignition switch ground to body

For the life of me I can't find the ignition switch installation in my 68 assembly manual and I'd like to know if there is some sort of star washer between the switch and the back of the dash, much like the wiper switch.

Frank.
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post #2 of 4 (permalink) Old Dec 3rd, 15, 09:40 PM
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Re: ignition switch ground to body

The ignition switch does not have a star washer. It does not require a ground. The switch only switches power.

68 Dana 302, 68 rs 327 daily driver/family car, 71 rs, track car/ driver, 68 firebird 400, 70 formula 400, 73 type LT, 98 TA, 2 goofy kids and an incredible wife.
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post #3 of 4 (permalink) Old Dec 3rd, 15, 09:54 PM
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Re: ignition switch ground to body

Quote:
Originally Posted by dale68z View Post
The ignition switch does not have a star washer. It does not require a ground. The switch only switches power.
That's not quite true. I can't help with the mounting hardware, but as "power only", well, the ignition switch has a "lamp test" terminal that provides a ground during cranking to illuminate the temperature light on dummy light cars, the ground comes from the mounting of the switch assembly. So if you have a dummy light car, a good ignition switch ground is important.
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post #4 of 4 (permalink) Old Dec 4th, 15, 04:21 AM Thread Starter
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Re: ignition switch ground to body

Quote:
Originally Posted by Coppertop View Post
That's not quite true. I can't help with the mounting hardware, but as "power only", well, the ignition switch has a "lamp test" terminal that provides a ground during cranking to illuminate the temperature light on dummy light cars, the ground comes from the mounting of the switch assembly. So if you have a dummy light car, a good ignition switch ground is important.
That is what I thought as well. I bench tested the switch and found out that the "temp lamp test" feature shorts the GND terminal to the switch's body when the key is in the cranking position. So that is why I figured the switch has to be grounded.

My dash has been painted inside and out and I sanded the back portion (where the switch goes) to bare metal but I'm still having problems getting a good ground. I understand I'm currently only tightening the switch by hand, but I figured a star washer could/would help. I'll try to rig something or find a large star washer, original or not, to get a good ground.
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