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Unread 03-17-2008, 08:31 AM   #1
Matusel3
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78-86 Heater components in a 77 CJ5

Will a switch/heater motor listed as working with a 78-86 CJ5 work in a 77 CJ5 with no modification, or will I need to make adjustments to use them?

Any input is appreciated, and I apologize if this topic has come up - I've searched and come up empty.

Thanks a lot,

~Matt

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Unread 03-17-2008, 08:42 AM   #2
PhatBasturd
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Depends. There were two types of heater boxes available in '77.

If your '77 is the "Type 2" heater box which is the version where the back of the blower motor pokes through the firewall then the aswer is YES.

If your heater box is a "Type 1" where the blower motor is inside the cab then the answer is NO.
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Unread 03-17-2008, 08:48 AM   #3
Matusel3
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My blower motor pokes through a black metal plate (flat circular plate) and has a plastic fan attached on the other side. The motor sticks out inside the cab, and the spindle for it goes into the heater box which is inside the cab.

http://tinypic.com/view.php?pic=2ebei6q&s=3

That's the best picture I have from before I took it apart.
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Unread 03-17-2008, 09:20 AM   #4
PhatBasturd
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So the answer is no. It won't work.

You need a counter clock wise (CCW) blower motor and a I think a two speed switch.

Do a search on CCW blower and you will find the part numbers and brands.
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Unread 03-17-2008, 10:17 AM   #5
jp360cj
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if you're going to buy a switch and motor, then you can use a ccw chevy motor with a rheostat switch. I can't remember the part number and my Jeep's 100 miles away, but search for chevy blazer motor upgrade and it's in one of the threads. the difference over stock is amazing
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Unread 03-17-2008, 10:25 AM   #6
Matusel3
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Alright, this whole jeep thing is my first foray into working on a vehicle, and it's a learning experience for me. I appreciate everyone taking the time to help a newbie.

I accidentally purchased a 1978 heater switch, so I've already got that. Is there a way I can make my blunder work?

http://cgi.ebay.com/ebaymotors/ws/eB...MEWN:IT&ih=009

That is the switch I purchased.

Can I do the blazer motor coupled with that switch, or can I somehow modify the 78-90 motor.

http://cgi.ebay.com/ebaymotors/ws/eB...MEWA:IT&ih=011

That is the motor I was looking at that is supposed to go with the switch.

Any chance I can make use of this switch in my 1977?

Thanks a ton for all the help.
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Unread 03-18-2008, 06:10 AM   #7
John Strenk
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I forget, did 77 heaters have 2 or three speeds? If they had two speeds, then yes you can make it work.
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Unread 03-18-2008, 06:48 AM   #8
Matusel3
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I never tried the heat before I tore everything out of the JEEP. Now I'm starting to reassemble and I'm looking to get new parts for the electronics and misc. broken pieces.

I'm not sure if it's a 2 or 3 way originally.

If you compare that switch in the eBay auction to this one for the 76-78 on Quadratec: http://www.quadratec.com/Assets/Imag...2/43172-lg.jpg

I noticed that it looks to be the same switch with a 3rd prong in the middle.

If I were to buy the standard 77 heater motor, could I (excuse me if I'm an idiot) snip off the 3rd prong and use the original black plastic plug harness, or just bypass that 3rd prong when wiring it.

All help is appreciated greatly as usual.

Thanks a lot,
~Matt
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Unread 03-18-2008, 06:57 AM   #9
jp360cj
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Quote:
Originally Posted by John Strenk View Post
I forget, did 77 heaters have 2 or three speeds? If they had two speeds, then yes you can make it work.
They had 2 speed motors. I would assume the 3 speed switches are rheostats, since everyone said they had to install a rheostat for the chevy swap, so I agree that the 3 speed switch should run the 2 speed motor, just use the high and low or high and med. But I would wire it up before final installation to make sure it works and see which one would be the best to bypass.
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