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Unread 02-07-2009, 08:12 PM   #1
Blthomas
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1979 CJ7 
 
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Did heater core, and blower motor upgrade, no fan now.

I hate to make 5 threads about all my issues, but figured they are separate items, so I'll go with it.

Swapped the old heater core two weeks back, and got the blower motor upgraded.

My other fan worked, but since I was there, I did the swap.

Now, I have no fan. The fuse is good under the dash, it's only got the one wire for pete's sake, what could be the deal?

Now that I have it assembled, can I test it with straight 12v from the battery?

I'm having issues with my lights right now in another thread, be nice if I could nail this down too.

Thanks very much for all the help.

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79' CJ7 - D30/D44, T150/D20, 3.73's, MC2100, Team Rushed, YJ top, 4" with 33" KM1, winch, skids, homemade bumpers, spray paint and a cool shift knob.
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Unread 02-07-2009, 08:50 PM   #2
Mike78cj7
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If your fan worked before you upgraded your new fan isn't grounded. But you should still check the wire feeding the fan before you go tearing it apart.
If you don't have a test light or meter try like you said and run a wire directly to the fan to see if that works. If not then it's a bad ground. If it does work it's the switch.
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Unread 02-08-2009, 12:13 AM   #3
kickingprop
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yeah the fan uses the firewall as a ground....so if it doesnt have good contact for a ground its going to be worthless. I'd go check the ground by touching a jump wire from the portion sticking out of the firewall in the engine bay to a solid ground and see if it works.
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Unread 02-08-2009, 04:41 PM   #4
Blthomas
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Hmmmmm. I had to cut the fire wall like most guys that did mod, problem is my hole was enormous. After I cut it, I was like damn! I guess I miss marked it when I drew the circle.

So I thought I would use some cork gasket and some RTV and seal it up. My rig is more function than looks.

Think all my RTV has somehow killed the ground?

I guess I'll tear it apart tomorrow if I can get my wiring fixed on my lights.

Thanks for the thoughts.
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Unread 02-08-2009, 04:50 PM   #5
BioTex
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Might be easier to add a ground wire/strap.
Use a self tapping screw on the outer housing after you sand off a clean spot. Put some solid #10 wire under it, and then to ground elsewhere. If it works, I'd go with it.
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Unread 02-08-2009, 04:51 PM   #6
John Strenk
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Got a lot of those self drilling , self tapping screws? I got a box of them myself.
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Unread 02-09-2009, 06:16 AM   #7
Oily
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Quote:
Originally Posted by Blthomas View Post
I had to cut the fire wall like most guys that did mod, problem is my hole was enormous. After I cut it, I was like damn! I guess I miss marked it when I drew the circle.
So I thought I would use some cork gasket and some RTV and seal it up. My rig is more function than looks.
Think all my RTV has somehow killed the ground?
NO. It does not ground there. In fact, it does not ground directly to the firewall. The heater motor bolts to the blower motor/heater core housing which bolts to the firewall (those four studs going into the engine bay). You should be able to put a ground wire on any of those bolts to keep from making another screw hole.
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Unread 02-09-2009, 07:34 AM   #8
Blthomas
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Thanks, I'll try that and see how it goes. I need to test the positive too, although like stated above it worked fine a couple weeks back.
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81' CJ8 bone stock (MC2100, Team Rushed)
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Unread 02-09-2009, 10:31 AM   #9
John Strenk
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You know, I think I'm getting his lights issues mixed up with his heating issues.
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Unread 02-10-2009, 11:09 AM   #10
Blthomas
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Might be. I picked up some self tapping screws, and new studs for the rear lights last night.

I'm going to try and knock this stuff out the next day or two.
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79' CJ7 - D30/D44, T150/D20, 3.73's, MC2100, Team Rushed, YJ top, 4" with 33" KM1, winch, skids, homemade bumpers, spray paint and a cool shift knob.
81' CJ8 bone stock (MC2100, Team Rushed)
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Unread 02-10-2009, 11:13 AM   #11
John Strenk
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See, I did get the threads mixed up.
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Unread 02-10-2009, 12:47 PM   #12
texasdave
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Originally Posted by John Strenk View Post
See, I did get the threads mixed up.
John your age is starting to show
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Unread 02-12-2009, 07:54 PM   #13
Blthomas
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All set now, after putting a new ground strap on the bolt, and trying to jump it, I was thinking maybe I got a bad fan motor.

I decided to check the fuses, although when looking at them with the flashlight they looked OK the other day.

Well the fan fuse, one peg was completely whitened from age/corrosion.

New fuse in and the fan came on and about blew me out of there.


Crossing this off the list and moving forwards. Thanks for all the help.
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79' CJ7 - D30/D44, T150/D20, 3.73's, MC2100, Team Rushed, YJ top, 4" with 33" KM1, winch, skids, homemade bumpers, spray paint and a cool shift knob.
81' CJ8 bone stock (MC2100, Team Rushed)
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Unread 02-13-2009, 03:00 AM   #14
John Strenk
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Quote:
Originally Posted by Blthomas View Post
All set now, after putting a new ground strap on the bolt, and trying to jump it, I was thinking maybe I got a bad fan motor.

I decided to check the fuses, although when looking at them with the flashlight they looked OK the other day.

Well the fan fuse, one peg was completely whitened from age/corrosion.

New fuse in and the fan came on and about blew me out of there.


Crossing this off the list and moving forwards. Thanks for all the help.
Well Thats great! Congradulations

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Originally Posted by texasdave View Post
John your age is starting to show
WHAT? SPEAK UP SONNY!
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