Question about 2004 Mazda 6

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One backup light is much dimmer than the other

The driver side backup light bulb is much dimmer than the other side. Ive replaced the bulb in that light but still the same issue. Ive heard that the backup light switch is notorius on these Mazda 6's (mine is 2004 3.0L manual). But wouldnt both lights fail?

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Check voltage with a multimeter on both sides.
if voltages are good, might be able to install a brighter bulp. Or LED's, perhaps.
Check with an aftermarket shop for mods. I'm sure there's something.

Posted on Jul 14, 2009

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Rtgantner's got it right. you could also just check the resistance in each bulb (poke the prongs 1 inch from the bulb in each wire) to see if maybe the old bulb that is brighter is in fact a different type (autozone has not yet given me the right bulb when i ask them to find me one). then check the resistance in the wire, if possible, between the bulb and (ideally) the switch to see if maybe one of the wires is bad. it's a simple matter of current. that bulb, for some reason, isn't getting the current it needs. that current is being choked out by resistance somewhere. this is a matter of finding what is "clogging the pipe" per se for flow of electrons.

Posted on Jul 15, 2009


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