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Old 02-05-2004, 12:33 AM   #1
nhluhr
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Join Date: Jun 2001
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Location: Seattle, WA
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2008 Mazdaspeed3
2006 Wrangler Sport

Default need some wiring help please!!

Ok so I just built myself a heavy duty wiring harness out of 12Ga wire, Hella 40-amp dual-87 relays, and 9005 connectors.

The way I have it set up is there is a 9004/9007 connector that plugs into the passenger side factory harness, then feeds over to the 3 relays near the battery.... two of the relays switch on the grounds for hi and low beam, and the third relay switches on the +12V for both lights. The hi's are 9005 bulbs in EDM housings and the lo's are 9005-connectors feeding HIDs in the lowbeam projector housings... so the only difference from my wiring diagram i worked from and my product is that instead of a single 9004/9007 connector at the bulbs, i have a pair of 9005 connectors, one each for the hi and low.

Now, the problem I'm having is that when I turn off the car, the lo-s turn off normally, but the HIbeams stay on and no matter what I do with the switch, I can't get the hibeams to turn off when I turn off the car. Any hints on what to look for or what to fix?

I used this wiring diagram from scoobymods.com regarding building a hi-current harness for the UK300 lamps:
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Old 02-05-2004, 08:45 AM   #2
Sparks
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B+ relay doesn't look right, when power is off the relay is supplying power th the hi beams in reverse.

Show me the circuit diagram of your relays for more help
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Old 02-05-2004, 12:51 PM   #3
nhluhr
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well my relays are just standard Hella relays with two 87 terminals (not an 87a), an 86, an 85, and a 30...
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Old 02-05-2004, 12:59 PM   #4
Sparks
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Okay - 86 & 30 complete the ground that connects 85 to 87, correct?

Looks like you're switching the ground through the other 2 relays.

What is on the B+ line with power on and off?

Trying to understand why pin 87 of the Hi relay gets power when the key is off

Shaun
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Old 02-05-2004, 01:03 PM   #5
Sparks
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Eliminate the power relay and run the + to pin 85 of both relays. Connect the B+ line to the B+ of both sockets.

All you'll control is battery voltage to the socket when each relay is triggered bu the main harness.
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Old 02-05-2004, 02:12 PM   #6
nhluhr
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Quote:
Originally posted by Sparks
Eliminate the power relay and run the + to pin 85 of both relays. Connect the B+ line to the B+ of both sockets.

All you'll control is battery voltage to the socket when each relay is triggered bu the main harness.
I'd prefer not to have constantly hot +12V running to each circuit...

how about if I just run the +12bat to the 85 terminals of each relay. . .
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Old 02-05-2004, 04:06 PM   #7
Sparks
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Yep 12 volts to 85, when the relay switches, the power will go through to the lights.

With the circuit off, the 12 will just be on the pin
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