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Username Post: 1964 impala tail lamps fuse blowing        (Topic#347610)
ap805 
Forum Newbie
Posts: 22
ap805
Reg: 02-10-15
10-10-17 09:17 PM - Post#2710460    

Hey impala friends, so I've searched around and did find a few posts on similar problems but nothing really clear.

so problem with me is when i go to install the fuse in the tail lamps section it sparks and blows, i unplug the fuse box from the firewall side install a fuse and when i plug the fuse box back in from firewall side fuse blows again, all this is going on with no tail lights connected.(all front head lights, front parking light and front signals work fine) Can anyone shoot some info on whats possibly causing this, thanks in advance.



 
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raycow 
Honored Member
Posts: 26686
raycow
Loc: San Francisco, CA
Reg: 11-26-02
10-10-17 09:39 PM - Post#2710465    
    In response to ap805

The tail light fuse also feeds the brake lights, the dome light, the clock, the glove box light, and the courtesy lights, if you have them. A short on any one of those can blow the fuse.

If I missed something in that list, don't worry, because one of the sharp-eyes on here will likely jump in with it. Until then, you should already have more than enough to keep you busy circuit checking.

These diagrams should be of some help. The wire you are concerned with is identified as black-orange (black with an orange tracer) coming off the fuse block. Just follow it through the diagrams and check everything which splits off from it.

http://www.oldcarmanualproject.com/tOCMP/wiring/57...

http://www.oldcarmanualproject.com/tOCMP/wiring/57...

You can save some money on fuses if you have a test lamp. If you don't, make one up from a small 12V bulb and a couple of leads with alligator clips. Remove the fuse and connect one lead to each fuse clip. If you have a short, the test lamp will light as soon as you connect it. When you find and disconnect the shorted component, the lamp will go out.

Ray

There's a line between good and evil no wider than a razor's edge - D.S. James Hathaway quoting from The Night Keeper


 
junky 
Frequent Contributor
Posts: 2193

Loc: Northeast CT
Reg: 06-27-10
10-11-17 04:45 AM - Post#2710482    
    In response to ap805

Check all courtesy light bulbs for the correct ones. The under dash courtesy bulbs are a double contact bulb, and if a single contact bulb is installed, it will cause a direct short. Same with the ceiling lamps in some years. Go for the simple fixes first, and then move onto other more difficult things to find, such as a pinched wire. An easy way to check bulbs is to remove them all, and try a new fuse, or make a test light as described above, and remove them one at a time. Also visually look at the bulb itself each time. The part number is usually stamped in black ink on the side of the bulb, and your owners manual will tell you the correct part number in the specifications section.

Never argue with an idiot. He'll drag you down to his level, then beat you with experience.


 
ap805 
Forum Newbie
Posts: 22
ap805
Reg: 02-10-15
10-11-17 12:47 PM - Post#2710542    
    In response to raycow

Thanks, will try this method for sure.



 
ap805 
Forum Newbie
Posts: 22
ap805
Reg: 02-10-15
10-11-17 12:49 PM - Post#2710543    
    In response to ap805

I'm pretty sure Raycow covered it well.

But is there anymore ideas or input of what's going on...




Edited by ap805 on 10-11-17 12:54 PM. Reason for edit: No reason given.

 
acardon 
Ultra Senior Member
Posts: 10854
acardon
Loc: DFW TEXAS
Reg: 03-25-05
10-11-17 04:10 PM - Post#2710564    
    In response to ap805

  • Quote:
But is there anymore ideas or input of what's going on...




Did you just rewire the car or did the fuse just started blowing? A common problem with a rewire is the instrument and dome light wires are crossed on the light switch.


Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)


 
ap805 
Forum Newbie
Posts: 22
ap805
Reg: 02-10-15
10-11-17 09:41 PM - Post#2710595    
    In response to acardon

fuse just started blowing, but i figured it out this evening.



 
ap805 
Forum Newbie
Posts: 22
ap805
Reg: 02-10-15
10-11-17 09:56 PM - Post#2710597    
    In response to raycow

Again thanks to Raycow for the info, it worked out perfectly. so i made up a 12v bulb with two lead connected it where the fuse was being blown and it lit up. started going throughout all the black and orange wires according to the wiring diaphragm disconnecting some of the harnesses and other connections until i disconnected the the main harness under driver side that goes to the tail lights and the test light would turn off. from there i plugged it back in and so it lit up and tried the following connection witch the dome lights harness and walla..... test light shuts off....so now i need to go through my dome light wires and correct it, but for now no more blowing fuses. I recently had my headliner redone so theres got to be a pinched line for the dome lights.

thanks again for the help and info guys.



 
raycow 
Honored Member
Posts: 26686
raycow
Loc: San Francisco, CA
Reg: 11-26-02
10-12-17 08:14 AM - Post#2710625    
    In response to ap805

Thank you for the feedback. I am very glad to hear you were able to locate the problem and isolate it so you could drive the car with everything else working.

Ray

There's a line between good and evil no wider than a razor's edge - D.S. James Hathaway quoting from The Night Keeper


 
ap805 
Forum Newbie
Posts: 22
ap805
Reg: 02-10-15
10-12-17 01:45 PM - Post#2710663    
    In response to raycow





 
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