Heater motor packed up again -- help!!

[BartonStag]

Hello all,
My heater motor along with the whole unit was u/s so stripped the lot out and replaced it, this time everything worked fine - happy days. Now though the motor has apparently packed up again (the car is still not on the road so maybe posible i've shorted something, somehow, unbeknown to me). Checked it out a bit today and appear to have voltage and an earth at the plug connector to the motor but it's dead. Is it likely the rheostat has let go? If so, is there a way to repair it, or is there any way to bypass it (tho i presume only with one fan speed)? Or any thoughts on any repairs that don't involve having to remove the dash and heater unit all over again please.
As ever folks thanks in advance
Cheers
Gord

[jleyton]

If the rheostat has gone then, according to the wiring diagram, the blower should still work on fast speed - it is just a resistor to reduce the current for slow speed.

I thought that the heater motors were fairly trouble free.

Cheers

Julian

[BartonStag]

Hi Julian,
I can see what you mean with regard to the wiring diagram Julian but it just wont work "as is", would you suspect i've shorted out the motor? Must admit i'm not to sure about this but...... having googled "what is a rheostat" the first answer shows two ways of connection, or at least thats as i read it?? It goes on to say "end to end" is one cicuit, so does that mean if it goes down you have it effectively connected only at one end?? Or am i misinterpreting this?
Cheers
Gord

[jleyton]

TBH Gord, I don't really know

To me, a rheostat is a variable resistor. I know Triumph use the description 'rheostat' but it looks just like a simple resistor in the wiring diagram.

I would have thought that, if you can get a direct 12v feed and a good earth to the motor then that should tell you if the problem is in the motor or not.

It may be worth looking back on Drew's White/Blue Bavarian Stag thread as he did write, in some detail, about his heater unit.

Good luck.

Cheers

Julian

[BartonStag]

Fair enough Julian, thanks for responding. One question though - how do i go about finding Drews thread please?

Cheers
Gord

[Goldstar]

Good old search function Gord here's the link, you'll need to search thread when you read it to find heater
http://www.stag.org.uk/forum/showthr...light=Bavarian

[Goldstar]

Ps search thread is top right of page in the grey banner

[BartonStag]

Good old search function Gord here's the link, you'll need to search thread when you read it to find heater
http://www.stag.org.uk/forum/showthr...light=Bavarian

Many thanks for that
cheers
Gord

[Goldstar]

No problem

[jleyton]

Good old search function Gord here's the link, you'll need to search thread when you read it to find heater
http://www.stag.org.uk/forum/showthr...light=Bavarian

Heater starts at post #672, which might save you a bit of searching !

Cheers

Julian

[BartonStag]

Heater starts at post #672, which might save you a bit of searching !

Cheers

Julian

Nice one thanks Julian

[v8ken]

Hi, you could just double check the connections and fuse and clean them. It is possible to get 12v at these connections, then when a high drain motor like the fan draws the current (switched on),it isn't enough to work it.
I frustratingly found this was what was happening on my heater fan motor.

Hope this helps, regards Ken.

[BartonStag]

Hi, you could just double check the connections and fuse and clean them. It is possible to get 12v at these connections, then when a high drain motor like the fan draws the current (switched on),it isn't enough to work it.
I frustratingly found this was what was happening on my heater fan motor.

Hope this helps, regards Ken.

Hi Ken,
Thanks for the input clearly you've experienced similar problems. I will check the connections as you suggest, but i'm beginning to think i may have lost the motor - further investigtion beckons i think.
Thanks again
Gord

[v8ken]

Gord
Just another thought, if you have a multimeter,check the resistance of the motor windings ,if an open circuit, then maybe your right.
Ken

[BartonStag]

Gord
Just another thought, if you have a multimeter,check the resistance of the motor windings ,if an open circuit, then maybe your right.
Ken

Hiya Ken,
Yep i'll give it all a good check when i'm on my days off, i only went out for a quick look today to be honest so no time really. I'm fearing the worst though, as the fan was working previously.
Cheers
Gord