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Old 11-07-2010, 08:02 AM
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Backup light fuse keeps blowing

Checked all the wiring to my backup lights, which are switched off the neutral safety switch on my column, and find no shorts... but it seems they only work once or twice and the fuse burns out again!

I called Painless, whose harness I am using, and they advised me to check the tail lights themselves and look for minor shorts to ground at the light sockets, found none.

Could my neutral safety switch be bad, how to test?
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Old 11-07-2010, 01:45 PM
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Try this.
Remove the bulbs.
Remove the fuse for that circuit.
Connect a test light across the fuse clips.
Put the shifter in reverse. Wiggle the shifter to see if the test light lights even for a flash, the switch is likely the problem.
If not wiggle the harness.
Put the bulbs back one at a time. Eventually you will get the test light to light.
There is a remote chance that one of the bulbs is bad even if it works.

vicrod

Last edited by vicrod; 11-07-2010 at 02:03 PM.
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Old 11-12-2010, 07:37 AM
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I'll try it today, thanks!

If it is the switch, I am not sure what vehicle my column came out of. The switch only has 2 sets of terminals, neutral safety and backup lights... I did a quick search at Napa and found one that looks similar, ECH NS6537, it's $25 - seem pricey for a switch...
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Old 11-12-2010, 04:29 PM
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5 bucks out of a junkyard
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Old 11-14-2010, 08:11 AM
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It's the switch

I pulled the connector off the switch and have been jumpering it with a small wire when I need backup lights, works fine

Found the target vehicle for a new switch too, 85 Chevy P20/P30 van; I'll try the yards this week
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Old 11-25-2010, 02:07 AM
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i never had a vehicle with backup lights worth using

when I switched to a floor shift, I didn't even bother with the NSS or backup light switch.. but eventually I did hook the up since NHRA rules require the NSS...
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Old 11-25-2010, 10:33 AM
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Turns out it wasn't the switch. I tested it with a junkyard switch and it blew the fuse too.

I re-insulated the pigtail as I suspected it was shorting against the column and the fuse has been fine, lights working, ever since.

The backup lights are super bright and do help vs. not having them, but I agree what would really help sometimes would be a reverse head lamp
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Old 11-25-2010, 04:11 PM
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I installed mini fog lamps from advanced auto (19.00) hidden under the bumper and tied them into the backup light circuit....... works very well
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