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Headlight Harness Upgrade Issue

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Old 03-31-2014, 09:53 AM
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Question Headlight Harness Upgrade Issue

Hi all,

I decided to upgrade the headlight harness in my 2001 Jeep Cherokee Sport.

For the most part, these are the directions I followed: http://jeep-xj.info/HowtoHeadlightLoom.htm

My issue is the headlights are on, even when the switch inside isn't pulled to the on position. When I pull the switch out to where the headlights would normally turn on with the factory harness, they shut off with the new harness.

The following describes the connections I have made:
-Red fused wires connected to the positive battery terminal
-Black headlight ground wires connected to the negative battery terminal
-Relay ground wires connected to a radiator support bolt
-High- and low-beam jumper wires connected to the factor headlight socket on the left side of the vehicle (as viewed from the front)

This is the type of relay I bought:
http://www.amazon.com/Parts-Express-Waterproof-Relay-Bracket/dp/B000PHLQJW/ref=sr_1_5?ie=UTF8&qid=1396277548&sr=8-5&keywords=5+pin+relay http://www.amazon.com/Parts-Express-Waterproof-Relay-Bracket/dp/B000PHLQJW/ref=sr_1_5?ie=UTF8&qid=1396277548&sr=8-5&keywords=5+pin+relay

Any ideas on where I messed up?

Thanks,

Bronson
Old 03-31-2014, 10:26 AM
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If you look at the schematic for the two relays, you will see they aren't the same.

Yours has a normally on and a normally off contact while the one in the article has two normally off contacts.

I suspect you have connected to pin 87 and need to move that connection to 87a.

Last edited by sreeb; 03-31-2014 at 10:31 AM.
Old 03-31-2014, 11:21 AM
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That makes sense! Since I'm only using 2 relays and not 4, I'll snag some of the correct kind and let you know how it goes.

Thank you very much,

Bronson
Old 03-31-2014, 01:57 PM
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It worked like a charm! Used NAPA part number AR274.

Thanks again for the help,

Bronson
Old 03-31-2014, 03:11 PM
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Originally Posted by BeRONSON
That makes sense! Since I'm only using 2 relays and not 4, I'll snag some of the correct kind and let you know how it goes.

Thank you very much,

Bronson
The ones you had should have worked fine. You just needed to change the connection from 87 to 87a.
Old 04-01-2014, 07:51 AM
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I already had the wiring set up to use all 5 pins on the relay. Yes, I could have just used it like a 4 pin relay by crimping two wires into a female spade and putting it on one of the 87 pins, but going the route I did made it more of an adventure

Your suggestion would have saved me some money, though. The original relays I purchased were about $3.50 each. The NAPA AR274 relays cost nearly $20 each. If anyone else finds themselves in the same situation I did but you're strapped for cash, use sreeb's method.

Cheers,

Bronson
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