Heater upgrade

[B.O.B.]

Got the new motor and cage for the upgrade but can't get the heater to operate. The motor s end like it is grounded by the housing. I have a ground wire coming off but it still won't work. Did I get the right motor or am I just not grounding it right?

[Gunnibronco]

I'd bench test the motor, I guess. Sounds right to me. I used the parts listed in this thread (maybe a different brand, but crossreferenced to the same vehicle, I forget), and added a ground wire from the motor to the metal part of the heater housing. Seemed to ground fine with the heater housing bolted to the firewall.

http://www.classicbroncos.com/forums/sh ... ostcount=6

[D&D72]

X2 I made a ground the same way. works good!

[B.O.B.]

Bench tested and works well. When installed in truck it pops the fuse because it doesn't seem like it's ground d well enough . Any thoughts.

[horseplay]

A popping fuse will be a power short to ground or circuit overload. Check your wiring and make sure your cage is free inside the box├╢

[Jesus_man]

A popping fuse will be a power short to ground or circuit overload. Check your wiring and make sure your cage is free inside the box├╢

Mine will rub at certain temps, so maybe the cage is binding on the box.

[Gunnibronco]

My heater fuse (in the original fuse box) was actually melting the solder inside the fuse itself. The tabs that held the fuse in place were rusty, and I cleaned them up with some sand paper & everything started working fine again.

Do you have a similar sized fuse on the bench test? That would eliminate the fan itself as the problem.

[B.O.B.]

So the cage was hitting the metal housing on the back and grounding out. Has anyone had to make a spacer plate between the motor and th housing. I cross referenced all the parts and they seem correct. What do you all think?

[Gunnibronco]

It's been a long time since I did this but I seem to remember that the fan had to be clocked to a specific location, or there was a problem. This might not be the same thing you have happening. It's just been to long ago for me to remember the specifics.

[landshark]

I also remember that I had to clock or move the motor slightly in the housing. I will be doing this on the 72 here soon so will refresh my memory.

[B.O.B.]

Had a buddy with a 3d printer make a small spacer between the housing and the motor to clearance the cage. Should work like a charm now. Got my reseal kit for Christmas so just need to do that and should be golden.

The core seems good but do you all think I should replace?

[landshark]

Had a buddy with a 3d printer make a small spacer between the housing and the motor to clearance the cage. Should work like a charm now. Got my reseal kit for Christmas so just need to do that and should be golden.

The core seems good but do you all think I should replace?

Mine looked good too but replaced it anyway, i say keep the old one around and flush it out with some water just in case. I have heard the new ones can leak. Also I noticed the new cores are thinner than the old ones but I got it to work fine a few weeks ago.