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Just wired up my rear spotlights and wires are heating up what would cause this.

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Wire size too small for the spot light current draw
increase the wire to a 10 amp wire or heavier

Posted on May 04, 2017

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There are two (2) possible problems.
1. What gauge of wires are you using? If the wire gauge is to small it will cause the wires to heat up because the draw of power needed to light the lights is too heavy of a load. You should use 12 gauge or even 10 gauge wires for the lights. It also would not hurt to put an in-line fuse on the hot wire (usually red) so the fuse blows and doesn't cause a fire.

2. You may have a "dead short" where the hot and neutral wires are cross connected which closes the circuit and generates heat. If the wires heat up when the switch is off I would start at the switch and make sure the connections are good and no wires touch any other wires. You may want to check the wires all the way back to see if any insulation is off and the hot wire (red) isn't touching any metal of the vehicle. Remember that vehicles are grounded to the frame so if a positive wire is bare and is touching any metal at all it will short out.

Hope this helps

Posted on May 04, 2017

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