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1957 - 1960 F100 & Larger F-Series Trucks Discuss the Box Style Ford Trucks

Universal 12 Circuit harness... stock light switch?

 
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Old 11-09-2018, 06:24 PM
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Universal 12 Circuit harness... stock light switch?

So am i over think this (too!) ? Looking over the wiring schematics, everthing flows through our stock light switch... the new fuse block (12 circuits with relay and flasher installed) has many if not all fused circuits for each of these functions (dome/courtesy, blinkers, brake switch, etc)... what did any of yall do... or do i have to dump the oringal switch (just bot a new replacement) or can it be used effectively ?

im probably over thinking ..
 
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Old 11-12-2018, 03:48 AM
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I replaced it with a more modern light switch without the built in fuses.

I also added a relay for the lights so all the power was not going through the switch.
 
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Old 11-12-2018, 06:38 AM
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I used a headlight switch from an early ‘70s F-series. Pretty much the same switch up into the ‘90s. Note that they still have internal circuit breakers (C/B) as shown in the wiring diagram below from 1972. In my case research indicated the headlight circuit trips at 12 amps and the auxiliary light circuit trips at 15 amps, but I still used relays with a separate circuit breaker under the hood for the headlights.


 
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Old 11-12-2018, 09:40 AM
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So I found this switch on ebay... is this like what you used and will the original shaft/**** from the '57 work in this?

https://www.ebay.com/itm/8-Terminal-Plunger-Style-Headlight-Switch-for-Mercury-Ford-Cougar-Pickup-F150/351010333071?epid=25021042163&hash=item51b9d8a18f: rk:16f:0
 
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Old 11-12-2018, 11:29 AM
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I just pulled the fuse block off the bottom of my switch & wired directly to the switch terminals. Works just fine.
 
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Old 11-12-2018, 07:43 PM
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Originally Posted by HyePo57 View Post
So I found this switch on ebay... is this like what you used and will the original shaft/**** from the '57 work in this?
No, I used the shaft/**** for the 70s and pulled the plastic **** off and put on a new **** for our years. The 70s light switches use a triangular shaft and if I remember correctly our years use a D-shaped shaft.
 

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