Question about 2004 Chevrolet TrailBlazer
It is usually a combination of heat from the light itself being transferred to the wiring through the electrical-connection blades, and heat generated by a less-than-optimal electrical connection (loose grip, corrosion, etc.).
It can be very helpful to ensure that air from the front of the car flows over the wires and the connectors.
Additionally, manufacturers use the thinnest gauge that will do the job under optimal conditions.
If you mean to retrofit a better system, probably the best thing to do is get yourself some weather-proof relays, and run the relays with the existing wiring, using the relays to provide power to the lights through much thicker wires, with the power coming to the relays directly from the battery, with an inline fuse. This should additionally produce noticeably brighter illumination. (A little brighter, but still noticeable.)
Posted on Aug 05, 2010
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Posted on Jan 02, 2017
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