Parasitic draw - 510 wagon

[hobbes_the_cat]

So have a parasitic draw on my 72 510 wagon. I used a test light and traced the short to the 20a horn circuit, but I don't know what this circuit powers besides the horn. Chilton and Haynes were no help. Any one have a list of what this circuit powers so I can trace the short?

[izzo]

Shoot, I have PDFs of all the wiring diagrams from Mitchel but they are at my house, with no internets :(

[hobbes_the_cat]

No problem man, Its not my daily so I'm not in a huge rush. ;)

[datzenmike]

Looks like it only powers the stop lights at the back... are they on???

 

 

Does your horn work right now???

[hobbes_the_cat]

The horn doesn't work. There was a bad leak by the tail lights so I will check there first. Thanks!

[metalmonkey47]

Got a multimeter?

 

This guy has a very helpful channel.

 

[datzenmike]

The reason the horn does not work is because it is on all the time. The previous owner just pulled the wires off the horn to quiet them... however the relay is still ON!!! and drawing a small amount of power. The horn button is possibly stuck thus keeping the relay ON.

[izzo]

Pm me ur email ill send it with my phone if u need that diagram still man

 

I have it for most datsuns.

[banzai510(hainz)]

good one Mike. on the horn alwas on.

 

Yes on 510s the horn relay powers the brake lights also.

 

3 dollar test light will work

[hobbes_the_cat]

Finally got around to fixing this. Mike was right, horn was stuck on. The actual horns are missing so i just unplugged the relay and no more draw!