Cab lights
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Postmaster
Joined: Jun 2008
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From: Michigan
Cab lights
OK so i robbed the cab lights off a semi for my 93 f250. Ive tested them and they all work. Now i have them installed i just need to finish wiring them in. I robbed a switch out of another semi, because i want these to be a seperate circuit from everything. Now I have a 20 amp switch and i was wondering how big of a fuse i would need for those 5 lights? I reckon a 10 amp fuse would do it? If not i guess i could always just put in a bigger fuse.
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Joined: Sep 2007
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From: Las vegas
I think 10 would be fine might not even need that many for just cab lights they are low watage so dont pull to many amps as long as you wire them in parallel.
Duh you have to wire them in in parrallel they ground threw the housing
Duh you have to wire them in in parrallel they ground threw the housing
Last edited by George D.; Apr 14, 2009 at 07:45 PM. Reason: I a dumb @&$
Posting Guru
Joined: Sep 2007
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From: Las vegas
Oh ok most bolt on lights have a metal srtip where the head of the bolt gose for the ground. If you ohm out one of the lights and tell me the resistance and howmany lights you are mounting I can tell you aproximatly howmany amps it will draw.
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From: Las vegas
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Post Fiend
Joined: Nov 2003
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From: Nutter Fort, WV
Stock F series cab light use #194 bulbs, around .27 amps each.
Depending on the bulbs your semi lights use, I would guess 1 amp each max.
#67 bulb was a common cab light bulb, they draw about .6 amps each.
Lots of semi cabs had fiberglass tops or even fiberglass cabs, so a ground to each light was needed.
Depending on the bulbs your semi lights use, I would guess 1 amp each max.
#67 bulb was a common cab light bulb, they draw about .6 amps each.
Lots of semi cabs had fiberglass tops or even fiberglass cabs, so a ground to each light was needed.
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Posting Guru
Joined: Sep 2007
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From: Las vegas
If you use 5 lights wich I think is the norm for the clearance lights a 5 amp fuse will be pleanty. I'm boared so i used the amps to find the home then did the math of resistance of the parrallel circute and used max exceptable resistance of wireing slices and a switch to come up with it I need a life
Post Fiend
Joined: Oct 2007
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From: Faibanks Ak.
Use relays I run multiple moose lights and 130 watt headlights on everything and use relays with 20 amp fuses.