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post #1 of (permalink) Old 10-28-2002, 11:22 AM Thread Starter
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2 winter questions

Well it is starting to get pretty cold here in VT and I need to start thinking about morning starts. My 88 GW has the factory engine warmer that plugs into the house. I plan on running an extension cord to it out side. Does anyone know how many amps this heater draws so that I can size the cord correctly? Do others use these heaters, are they worth the trouble?

My second question is about the defoster in my 88. The heat seems to work, ie the air that comes out is warm. But the problem is that I do not get very much air volume. The fan seems like it isn't working correctly. But when I turn on the AC the fan will just about blow your cloaths off. Are there two different fans? How come it works with the AC on but not the heat? I am mostly concerened with defrost. Thanks for any info.
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post #2 of (permalink) Old 10-28-2002, 03:22 PM
 
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Re: 2 winter questions

I can help you with heat/defrost problem. The heater and air conditioning do have different blowers. The heater blower is that round thing on the left side of the firewall if your are facing the engine. I replaced mine a few months ago and it cost me around $40 for a new one at autozone. It is very easy to change out. There are four screws that hold the unit in place, a retaining clip that holds the squirrel cage fan to the shaft of the motor, and a wiring connection and a ground wire. I would check out all the electrical connections and put voltmeter on it before going and buying new unit though.
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post #3 of (permalink) Old 10-28-2002, 03:29 PM
 
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Re: 2 winter questions

well maybe this attachment will work [img]images/graemlins/crazy.gif[/img]
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post #4 of (permalink) Old 10-28-2002, 07:33 PM
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Re: 2 winter questions

I live in Alaska, and I wouln't have a vehicle without the heater you are talking about. It's actually called a block heater, and it is installed in place of a freeze plug. I personally run 2 (one on each side of the block) and an electric battery blanket. They definitly make a difference.
post #5 of (permalink) Old 10-29-2002, 08:16 AM Thread Starter
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Re: 2 winter questions

Thanks very much for the info. I am pretty new to the FSJ I just got the GW about a month and a half ago and I am still learning. I will be sure to test the Fan and $40 doesn't sound too bad for keeping warm.
It sounds like you know quite a bit about the heater blower. Does anyone happen to know what the voltage and amp reading should be on that motor, and where should I test from. I am guessing ground the neg. and test the positive where the power wire goes to the motor. (You can probably guess I don't have a lot of experence testing electrical stuff But I am lerning)
And just one more thing... Could a bad ground cause the motor to work poorly, or would a bad ground just cause it to not work at all?
Thanks again for all the help!
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post #6 of (permalink) Old 12-10-2002, 12:22 AM
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Re: 2 winter questions

AlaskaXJ, you don't use an oil pan heater?? We gotta use 'em up here in Fairbanks. Usually, an oil pan heater, battery warmer, and one block heater works fine, even at
-70F. If you need 2 block heaters, a 1500 watt circulating block heater might work better in your FSJ. Worked good in my parents Cherokees ('70s).
post #7 of (permalink) Old 12-10-2002, 04:39 PM
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Re: 2 winter questions

All the wagoneers I have owned only had 1 fan . Just a baffle to change air flow from air to heat...I would check and see if your defrost vaccume baffle is moving ...drivers side of heater...near gas peddle....watch lever and switch from heat to defrost...if that is ok...check your air..heat baffle switch...be on passenger side near kick pannle....
may just be some vaccume lines off or cracked....
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