Work light + trailer harness = no lights, radio, or clock

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Frobisher
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Work light + trailer harness = no lights, radio, or clock

Post by Frobisher » Wed Jul 10, 2013 3:20 pm

I was following directions from a forum on connecting the trailer harness in back to a work light. I had the 2 hot leads (1 from the battery, 1 from the fog light switch), the ground, and the lamp. What could go wrong? My friend sparked the battery lead (purple/brown - C425 maybe) "just to check" and all of sudden the power to it died as did the interior lights, clock, and radio.

I've checked all the fuses and they're good. What I think are the fusable links in the engine compartment all have continuity. Is there a relay I'm missing somewhere. I've tried to track it down in the RAVE and the Haynes, but I can't seem to figure out where it is. Rovers North (where I bought the fused relay for the light) said there may be a relay under the dash on the passenger side, but I couldn't find it.

Perhaps this is an easy fix for those of you who have done such things. Maybe? The rover runs fine otherwise; it's just those pesky internal electrics.

Thanks.
Greg
Greg
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Frobisher
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Re: Work light + trailer harness = no lights, radio, or cloc

Post by Frobisher » Thu Jul 11, 2013 10:21 pm

Bad fuse. No biscuit. Three Stooges rover repair strikes again. I really need to read that fuse chart more carefully. Always align the fuses with what the book says, and life will go much better.
Greg
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jagspeed
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Re: Work light + trailer harness = no lights, radio, or cloc

Post by jagspeed » Thu Jul 11, 2013 11:07 pm

This is exactly what you get when you let friends help by "sparking" wires.

Checking for power in a wire by briefly touching it to ground, is just like checking if a gun is loaded by looking down the barrel and briefly pulling the trigger...

I'm glad it was only a fuse; if this were a P38 you might have fried the big suitcase computer under the right front seat.
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series guy
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Re: Work light + trailer harness = no lights, radio, or cloc

Post by series guy » Thu Jul 11, 2013 11:36 pm

If you fry the body ECU on a P38 the next step involves the gun and trigger thing.
Diesel powered engines and parabolic leaf springs. These are a few of my favorite things.

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Frobisher
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Re: Work light + trailer harness = no lights, radio, or cloc

Post by Frobisher » Fri Jul 12, 2013 12:46 am

The funny thing is my friend is an electrical engineer from CMU. That might explain everything. Alas, no harm done, but I'm definitely putting it in the lessons learned folder. Thanks for the pointers on how badly it can go.
Greg
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jagspeed
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Re: Work light + trailer harness = no lights, radio, or cloc

Post by jagspeed » Fri Jul 12, 2013 9:43 am

series guy wrote:If you fry the body ECU on a P38 the next step involves the gun and trigger thing.
a gallon of petrol and a road flare are quieter...
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Frobisher
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Re: Work light + trailer harness = no lights, radio, or cloc

Post by Frobisher » Fri Jul 12, 2013 9:45 am

And more subtle.
Greg
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dcarr1971
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Re: Work light + trailer harness = no lights, radio, or cloc

Post by dcarr1971 » Fri Jul 12, 2013 2:42 pm

I had really wanted a P38 before I knew anything about them. Dear lord, am I ever glad I bought a D2 for my first Rover instead of a P38...
Dave C
1999 Disco 2 <-- Not leaking, just marking my driveway as its own since June 2010!
1996 Disco 1 <-- Crazy Red

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