Where did you hook up the little wire for an electric fan? - JeepForum.com
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Unread Yesterday, 06:31 PM   #1
Paxter
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1999 TJ Wrangler 
 
Join Date: Jan 2011
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Where did you hook up the little wire for an electric fan?

I can't seem to find the answer anywhere and I'm sure it's so simple...yet I am so bad with electrical. I'm waiting for my new thermostat control box to come in the mail and in the mean time I need to have a fan going. So my question is, where did you hook up the little 14 gauge wire so that when I turn the ignition on, the fan comes on, and when I turn it off, the fan shuts off. This is out of a 99 wrangler 4.0l

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Unread Today, 03:39 AM   #2
mukluk
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Assuming you're talking about a non-factory electric fan for your radiator (since all 4.0L TJs originally had a mechanical fan and viscous clutch bolted to the water pump), the most logical place to tie in the wire would be to the fuel pump relay output -- you would have power any time the engine is running.
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Unread Today, 08:09 AM   #3
2jhanna
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2002 TJ Wrangler 
 
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If you want to simply have it come on/off with the ignition, you could use any assy switched power, like radio or similar, to pull a relay to provide fan power.

Doesn't a '99 have extra leads behind the glovebox?
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Unread Today, 08:32 AM   #4
JWebber
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yes 99 TJ's have a switch power lead and a constant direct and are labeled or should be.
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Unread Today, 08:53 AM   #5
2jhanna
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Quote:
Originally Posted by JWebber View Post
yes 99 TJ's have a switch power lead and a constant direct and are labeled or should be.
OP, there you go, use the switched power lead to pull in a relay with new fused power from the battery to operate the fan.
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Unread Today, 04:20 PM   #6
smccollamjr
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Definitely use a relay.
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