Lights quit working / light switch gets really hot
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
Also anything else not working? Dome light at the switch. Dash lights? Switch feel loose when you pull the **** out?
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
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Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
2X. I think it is either a bad switch or someone hacked in to the wiring leading to the switch to also power something else. In the schematic above, the wire connecting to the H/L switch marked circuit "25" is a 12V constant power source. So you need to check the wiring. If everything is OK then change the switch. You don't want this problem to shoot your truck up in flames.
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Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 83
From: NorCal
Ron Francis Wiring is also Fordish.
Painless and American Autowire are more GM-oriented but usable.
Fleet Mechanic
Joined: May 2001
Posts: 1,396
Likes: 4
From: Cupertino
They are not painless.
Semper Fi
Freshman User
Joined: Dec 2015
Posts: 26
Likes: 0
Lights
I had the same problem with my 70 Short bed, while the switch is more than likely the problem, mine was the hi-beam switch. I swapped it out and everything worked.
Also, check out ebay for a harness. I didn't have the cash to install a new harness, so I looked at eBay and found a mint harness for $100, no splices and it's in great shape.
Also, check out ebay for a harness. I didn't have the cash to install a new harness, so I looked at eBay and found a mint harness for $100, no splices and it's in great shape.
