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03-17-2013, 12:31 PM
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#1 |
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Registered User
Join Date: Jun 2007
Location: Buda, Texas
Posts: 865
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why does the fuse blow to taillights
Only when the headlights are on and driving. Replaced the headlight switch and this truck came from Arizona.....sockets look good. All lights work and the wiring harness to taillights look real good.
Does not blow fuse when I disconnect wiring harness at back of truck so its not the dome light or door switches I would guess. How do I track this down?
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 70chevytruck |
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03-17-2013, 12:44 PM
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#2 |
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Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,141
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Re: why does the fuse blow to taillights
Pull the bulbs and try again. Add one buld and try, then swap. I'd bet one of the tail light housings are shorted out.
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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03-17-2013, 12:57 PM
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#3 | |
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Registered Cruiser
Join Date: May 2002
Location: Las Vegas NV
Posts: 2,230
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Re: why does the fuse blow to taillights
Quote:
Give everything a close visual inspection for cracked wires, and bad grounds. Be suspicious of anywhere someone's tride to hook up trailer lights. Check, and clean all grounds.
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I intend to live forever. So far, so good. |
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03-17-2013, 01:52 PM
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#4 |
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Registered User
Join Date: Apr 2010
Location: Russiaville
Posts: 203
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Re: why does the fuse blow to taillights
Fuses blow because excess current is flowing thru them.( turn on headlights increases current flow) Disconnecting wiring isn't necessarily going to help you track this down. Check to make certain that you have correct size fuse 2. Connect a volt meter in line to check amp flow looking for excess flow. The meter should be placed in an open in the circuit, thus completing the circuit.(ie: unplug connector,connect meter probes in voltage feed line, jumper the other connections) Electrical problems can be a pita to solve.
Your light bulbs act as the resistors in your circuits, regulating the flow of current. Somewhere in the circuit current is bypassing the bulbs creating what is known as a short, a "short cut to ground" You can check your plugs and sockets for shorts by unplugging them and checking them for continuity,(lights turned off) there should be no flow thru the plug/socket.
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......its not what your askin', its what your gettin'.... .......every time I screw up, I learn something. Needless to say, I'm learning all the time............ Last edited by biggestjohn; 03-17-2013 at 02:04 PM. Reason: mo |
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03-17-2013, 04:38 PM
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#5 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: why does the fuse blow to taillights
use good tools and check inch by inch of the wiring// especially the few places where the metal clips hold it in place in the frame rail
also look for bubba splices where they hooked up traila lights
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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03-17-2013, 07:47 PM
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#6 |
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Registered User
Join Date: Dec 2012
Location: Altoona Iowa
Posts: 481
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Re: why does the fuse blow to taillights
you def got a short somewhere in the rear.
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