Clearance lights
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Elder User
Joined: Feb 2005
Posts: 509
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From: Lebanon OR
Clearance lights
I'm thinking about adding clearance lights to the roof of my cab. Was this a factory option or dealer installed. is he wiring harness still available and where did they tie into the lighting system? Whats the proper layout? I've seen five lights equally spaced and three in center group with two out board.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
I'm thinking about adding clearance lights to the roof of my cab. Was this a factory option or dealer installed (both).
Is the wiring harness still available (no) and where did they tie into the lighting system? Whats the proper layout?
I've seen five lights equally spaced and three in center group with two out board.
The usual arrangement.
Is the wiring harness still available (no) and where did they tie into the lighting system? Whats the proper layout?
I've seen five lights equally spaced and three in center group with two out board.
The usual arrangement.
Very few parts are available for these trucks, some are available NOS, some have been reproduced.
Some of the repro parts sellers offer clearance lamps, but they are newer, won't match the originals.
IMO, look for these lamps at trucks in junkyards, then you can get the wiring harness, the switch and etc.
Cargo Master
Joined: Apr 2001
Posts: 2,697
Likes: 46
From: Vancouver
My '66 Merc was equipped with three more or less in the middle and none on the corners. I never see modern trucks so equipped so my guess is that the three light layout is no longer legal, at least where I am. They were spliced into the headlight circuit off the switch. The truck also had a momentary switch with "blink marker" on the bezel which would allow the driver to turn the lights off, I guess to signal others.
Eric
Eric
Cargo Master
Joined: Oct 2005
Posts: 2,084
Likes: 94
From: Stanton, Michigan, USA
My '66 Merc was equipped with three more or less in the middle and none on the corners. I never see modern trucks so equipped so my guess is that the three light layout is no longer legal, at least where I am. They were spliced into the headlight circuit off the switch. The truck also had a momentary switch with "blink marker" on the bezel which would allow the driver to turn the lights off, I guess to signal others.
Eric
Eric
For us curious types - would you please further describe the function of the 'blink marker' switch - was it simply an on/off switch for the clearance lights?
Thanks!
BarnieTrk
Cargo Master
Joined: Apr 2001
Posts: 2,697
Likes: 46
From: Vancouver
It was a momentary switch, like a starter button of old, installed in a hole drilled in the dimple where the vent pull button was on the earlier trucks. Push and hold the button the clearance lights go out, release it and they come on. I guess it was for signalling other drivers - can't think of another reason for it.
Eric
Eric
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Cargo Master
Joined: Oct 2005
Posts: 2,084
Likes: 94
From: Stanton, Michigan, USA
Thanks for the explanation, 6t6merc!
I'm guessing that looking at the illustration provided by ND in post#2, it would be part#15443.....
BarnieTrk
By the way, this subject reminds me of when I was in Japan (~20 years ago). I asked someone why some of the bigger trucks going down the highways would have their clearance lights blinking..... I was told that when the truck exceeded the posted speed limit, their cab mounted clearance lights would blink to notify those drivers around them. Yep, no kidding......
I'm guessing that looking at the illustration provided by ND in post#2, it would be part#15443.....
BarnieTrk
By the way, this subject reminds me of when I was in Japan (~20 years ago). I asked someone why some of the bigger trucks going down the highways would have their clearance lights blinking..... I was told that when the truck exceeded the posted speed limit, their cab mounted clearance lights would blink to notify those drivers around them. Yep, no kidding......
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