Having problems with your Cars & Trucks ?

Tail lights blowing fuse

\015 Have already explained it.\015 Posted / edited by AnonymousUser on : 25-01-2021

Answers :

This one is easy to explain - but unfortunately will probably more difficult to actually find. Unless you have been messing around with different lamps than those called for, installed a lamp incorrectly, put in the wrong size fuse or are connecting a trailer with a bad harness / connections, the fuse is likely blowing because of a short circuit.
That is it for the easy part. The hard part is that depending on make & model vehicle, the wiring may be routed inside or outside the vehicle from the light switch all the way to the tail lights (and possibly the front & rear marker lights & front running lights, too). You'll need to isolate sections of the affected circuit to see which section the fault is located in - and then visually inspect the entire length of this part of the circuit for the location of the short.
Do the easy stuff first. Check all the affected lamps and sockets on the problem circuit. Look for rust, loose and broken wires, faulty lamp sockets, lamps installed wrongly, wrong lamp types, water damage, etc. Make sure that any loose wires you find are taped up - and test again. If that solves the problem make the required repairs - otherwise, keep going. Inspect all parts of the circuit that are plainly visible. Visually check / feel for chafed or damaged insulation on wires. Wires that enter plastic tubes will not usually be a problem - but do look for evidence of a damaged / crushed tube that could indicate a problem for wires inside. Hopefully, you will have found the problem by this point. Most times, problems will be found in the places previously mentioned. If unable to locate, you might need an experienced mechanic / copy of the vehicle electrical diagram to help solve the problem.
Good luck!
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