Reverse Light Blowing Fuse

[CtrMint]

faulty led in the reverse light?  Its a bulb?

If I check the continuity from the lights terminals to the fuel tank, both are are grounded, is that expected?

[ChrisC]

I suspect the switch as well, maybe the loom got caught during engine install.

[ChrisC]

I guess that’s lead not led

[bosshogg]

No that's not right. Can you take the lens cover off the light, take the bulb out and check the two again.

[ChrisC]

Have you disconnected everything, if not the bulbs will show a low resistance reading with earth.  It’s why I said disconnect the rear lights and the reverse light and the fuse, so we can start ruling stuff out

[CtrMint]

I removed the bulb everything, I checked the plug which goes into the light, both are grounded.

[ChrisC]

Fuse and switch? 

[ChrisC]

Sorry re-read what you posted, both connections to the reverse light are earth with the bulb removed? 

[CtrMint]

correct.

I've talking the pins in the econoseal plug (loomside) which go into the light.  The light itself is fine,

[ChrisC]

sorry wrong end of the stick.  Now disconnect your reverse light switch

[CtrMint]

Though could that be right if the only restive load comes from the filament?

[CtrMint]

forget that...

[CtrMint]

I havent reconnected it yet.

[ChrisC]

You said before,

1, Fuse blows if you select reverse, with the reverse lamp unit disconnected.

AND 

2, The fuse does not blow until you select reverse.

This only leave two options

1 The reverse switch is faulty once reverse is selected

2 The Green Brown wire is shorted to earth in the loom. 

Disconnect the wires from the reverse switch and leave the reverse light disconnect, then check if the green brown wire or the switch wires have connection to earth.  

I hope for your builds sake it’s the switch wires that are the problem.

[CtrMint]

 I believe "2 The Green Brown wire is shorted to earth in the loom. " is the answer

[ChrisC]

With the switch and light disconnected?

[CtrMint]

Yes

[ChrisC]

That’s bad news, time to put your findings into an email to CC.   Can you trace the reverse light wire back from the light and back into the tunnel and check for damage or trapping.  Example the dedion tube or rear anti roll bar trapping the wiring, or even the diff mount.

[CtrMint]

Game over... life is too short for this.  

I have thrown the towel in a number of times but this is joke,  I truly have no inclination to spend my spare time with this anymore.

Thanks for the help.

[bosshogg]

Great work Chris C, and feel for you Ctr. You would have thought it would have to be some pretty obvious damage to be giving such a consistent earth with no water about.

[CtrMint]

I am right in understanding I've basically got to strip the thing down to find out what is going on.....

[bosshogg]

I would run through this with CC on the phone before you get too disheartened, they may have some ideas that we don't.

[ChrisC]

I don’t think so, the wire only goes front the reverse switch, along the tunnel, down the back panel, along the tube below the dedion tube and round into the light, and the damage should be obvious, if there is no  visible damage then it’s CC’s problem, unfortunately this will ruin your schedule, but CC will fix it, if it’s not damaged.   

Option B make a lead and that will replace the faulty wire, tie wrap it to the loom so you can pass IOM IVA, then get CC to fix when it goes to PBC.  CC will make you that lead I am sure given the situation.

[CtrMint]

Chris what about the black wire that's in the light, that's not in the tunnel as far as I can see.

Sorry that should read, on the plug by the box.

[ChrisC]

It’s only the Green Brown wire that’s the problem.  The black wire should be earthed.  You can dismantle the eco seal connector, pull out the ‘broken’ Green Brown wire, and put in the replacement.   You remove the yellow locking insert, then lift the tiny tag that holds the pin, and out comes the wire.   But speak to CC first and float that plan.