Mystery Wire
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Junior User
Joined: May 2003
Posts: 54
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Mystery Wire
1990 AWD 4.0 EB
While changing my plugs I found a wire at the front of the engine. It comes down the right side "When facing engine" then turns left right by the radiator hose inlet. It is a small elbow about 18 gauge and is a red wire. I can not see where this would plug into. It was behind the top water inlet and just in front of the Fuel pressure regulator.
Anybody know what this is?
While changing my plugs I found a wire at the front of the engine. It comes down the right side "When facing engine" then turns left right by the radiator hose inlet. It is a small elbow about 18 gauge and is a red wire. I can not see where this would plug into. It was behind the top water inlet and just in front of the Fuel pressure regulator.
Anybody know what this is?
Postmaster
Joined: Apr 2001
Posts: 3,818
Likes: 3
Mystery Wire
If there is a connector on the end, mine has the same mystery wire and I have never been able to determine why it was there. I assume this was for a smog pump or similar accessory for California or export models.
Postmaster
Joined: Apr 2001
Posts: 3,818
Likes: 3
Mystery Wire
A single post connector like that is used on the water temperature sensor, the one that send info to the temperature gauge. There is a second, coolant temp. sensor with a 2 wire connector that feeds data to the electronic engine control unit.
There is also a knock sensor in that vacinity, but I cannot recall offhand if it uses a single or double wire lead. I'll try to remember to check the manual this evening and post back.
There is also a knock sensor in that vacinity, but I cannot recall offhand if it uses a single or double wire lead. I'll try to remember to check the manual this evening and post back.
Post Fiend
Joined: Mar 2003
Posts: 14,413
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From: Sarnia, Ontario, CANADA!
Mystery Wire
My 89 van has that stupid wire too! I thought it was a wire for a temp sensor or something. I also have the digital dash too. (I LOVE the digital dash!) It might be for that! I dont know.
-Matt
-Matt
