Heater motor

[Bird 426]

I rebuilt my heater box about a year ago. Wrapping up dash work last night I powered things up. Heater motor doesn't work. Has power, looked through my FSM, can't seem to find the motor, it does ground through metal heater back that is mounted to the firewall ? Guess that I have missed something here, it's been apart too long. Looks like I will be taking the box out again. The motor worked when I had it all apart. Sure does get old having to take things back apart that you rebuilt! Will let you know what I find.
'69 RR, non A/C

 

[MWbirdLOVER70]

I rebuilt my heater box about a year ago. Wrapping up dash work last night I powered things up. Heater motor doesn't work. Has power, looked through my FSM, can't seem to find the motor, it does ground through metal heater back that is mounted to the firewall ? Guess that I have missed something here, it's been apart too long. Looks like I will be taking the box out again. The motor worked when I had it all apart. Sure does get old having to take things back apart that you rebuilt! Will let you know what I find.
'69 RR, non A/C

Maybe run a jumper lead from ground to a better ground and see if it powers up

 

[Bird 426]

It is a grounding problem. Dropped the heater box. Put star washers in place on the ground wire. New painted box is the rest of it. We'll get her now.
Thank you for answering!

 

[RemCharger]

The nuts that hold the box to the fire wall should have teeth on them.

 

[dadsbee]

 

[WileE]

The nuts that hold the box to the fire wall should have teeth on them.

 

[Bird 426]

The 3 firewall nuts do have serated washers, the failure was at the ground wire, paint. Just for insurance, I made another ground wire and ran it up to the cowl stud, upper heater bracket.
It works great now, will need to get the Hemi together so that it will actually make heat!
Thanks again.