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Unread 08-15-2013, 09:32 PM   #1
jessman1979
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1981 CJ7 
 
Join Date: Aug 2013
Location: Sonora, CA
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Red wire under manifold, carb???

I have a 1981 CJ7 and dont know what the red wire is that goes under the manifold, or the carb. Cant tell what it goes to. It is burned through and melted so i want to know If I can just detatch it. Tried uploading a pic but it said it was to big for this site. If you need me to email it to you please let me know. Thank you.

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Unread 08-15-2013, 09:37 PM   #2
WindKnot
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1977 CJ7 
 
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Location: , Northern Arizona
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You may want to see if there is a wire going to the electric choke of your carburetor. Does your Jeep start up easy when it's cold?
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Unread 08-15-2013, 09:47 PM   #3
jessman1979
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It has a manual choke installed, but yes there is a wire from the original electric choke. Sorry I am new not only to jeeps but working on cars peroid. So learning slowly. But it did take forever to start, so I bought a webber 32/36 and have not started to install it yet before I find out what this wire is.
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Unread 08-15-2013, 10:13 PM   #4
WindKnot
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I see that you are in California. I don't know for sure, but I believe the ONLY California Air Resources Board (CARB) compliant carburetor is the original.

BEFORE you do anything, VERIFY that you can swap the carb and pass the smog test. I'd hate to see the Weber become nonreturnable if you can't use it.
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Unread 08-15-2013, 10:15 PM   #5
jessman1979
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1981 CJ7 
 
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I did pass smog already and where I live in Cali I only have to smog it once and never again if I dont sell it. So thats cool. But maybe it has to do with my electric choke?
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Unread 08-15-2013, 10:23 PM   #6
jayzcj5
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1978 CJ5 
 
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Its for your manifold heater. Look down the carb with the butterflies wide open (engine off!) and if u see a bunch of spike-lookin prongs in there then that is it. They say it should be hooked up for cold weather starting. It helps heat the air fuel ratio in the cold so the jeep runs ok until it gets warm. I'm not sure on the stock wiring though? I was actually just about to post this question myself.

My situation is a little different because I put a Howell EFI on my jeep and it said in the manual to hook it up directly to a 12v power source which would mean it would be on all the time while the jeep is running. Not really sure if I even need it at all since the computer has a warm up mode anyway. Once I find out if it is really ok to run it all the time I will probably hook it up. In your case I think u need to find out how it is wired in its stock form. Maybe u can just do what I'm going to do? Hopefully others will chime in for the both of us.
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Unread 08-15-2013, 10:26 PM   #7
jessman1979
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Hey thank you so much for writing. I will look into it also. Hopefull I can just use the original wiring. Thanks again.
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Unread 08-15-2013, 10:35 PM   #8
WindKnot
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My '77 is red.
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Unread 08-16-2013, 03:59 AM   #9
John Strenk
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This is were it goes:


There is a relay controlled by an oil pressure switch and a water temp switch that turns this heater on.

If there is enough oil pressure and the water temp is cold enough, then relay activates supplying power to this heater.
Once the temp gets above 160*, the temp switch opens and the relay shuts off turning the heater off.

Why Howell wants to keep it on all the time is beyond me. Even if it has a warm up mode, it doesn't keep fuel from condensing on the manifold when it's cold but once it's warm, you just don't need it anymore.
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Unread 08-16-2013, 05:09 AM   #10
jayzcj5
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Where is the temp switch and relay located? I can probably hook it back up as intended if I get the right switch.
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Unread 08-16-2013, 05:14 AM   #11
jimbos76cj
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Quote:
Originally Posted by jayzcj5 View Post
Where is the temp switch and relay located? I can probably hook it back up as intended if I get the right switch.
Does it look like it melted from heat from an outside source or because it shorted out and became hot? HAve you checked to see if it has power to it? Id start the jeep and check it for power before it has a chance to warm up.
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