Troubleshooting a PIAA Driving Light Electrical Issue

PROBLEM:

I necessitate a small advice. I have got the PIAA visible lights installed and they worked good for a year. Now they blow the inline electrical fuse every clip I turn them on. I unmounted the PIAA visible lights from the main road barroom and now the electrical fuse no longer blows out. I set a voltmeter on the wall hanging PIAA visible light metallic element casing while they are on and the voltmeter reads 12V. Ouch, I look inside one of the PIAA visible visible visible lights and they are internally grounded to a prison guard inside the casing.

Since I can read 12V while touching the casing of the lights, makes this intend value their is bare metallic element touching the hot wire or makes it mean my land is bad?

This is happening on two separate Kingpins that have got these PIAAs installed.

I checked the draw when the lights are on and not mounted to the metallic element main road bars. It is low. I am able to utilize a 15 ampere electrical fuse without it blowing. These visible lights propose a 30amp, so that is good news.

If you have got any tips on what is causing this, delight allow me know. I am guessing I have got a bad land since the wiring inside and outside the visible lights looks good with no open wires.

With both bulbs removed and the PIAA shells attached to the bike, no blown fuse. And my other set of littler halogens driving visible lights remain on.

I will replace the bulbs.

SOLUTION:

I replaced the bulb and still had the short. Not one to give up I disasembled the PIAA light. Since the outside PIAA shell was still reading 12Volts Iodine new that something internal to the visible light was not being grounded correctly. On one of the PIAAs Iodine reasembled measure by step, checking for the short as I went. I got the the last prison guard that throws on the presence casing with the lense and checked. The electrical fuse bew. Ok, the prison guard is contacting the internatl lighting component. The insularity must have got worn out. So I set a thin piece of India rubber over the hole and then reattached the bolt. This solved the job on the left PIAA. The outside casing now read 0 volts.

The right casing was a small different. It was shorting out without even attaching the screws. So I took this apart and reassembled. This fixed the job and the right PIAA shell now reads 0 Volts and no more than short pants on the 30 Ampere in-line fuse.

I believe I sacrificed 50 electrical fuses to decide this and bought $80 substitution PIAA bulbs that I most likely did not need. Now I have got some spares.

I cognize this state of affairs is occurring on another Kingpin and I wager it is the same issue where the internal gorunding of the PIAA have been compromised through age.