Heater wiring

Post by **jollyroger** » Sun Dec 30, 2007 6:23 pm

I have just replaced the heater core and the feed wire to the motor came off - not at the spade end to the motor but the other end of this wire i.e a bullet connector behind the dash. I can't find where it goes back into. I have tried two connectors and they seem to be dead even when I swithch on the ignition and the heater switch. Any suggestions?

Post by **Peetee** » Sun Dec 30, 2007 6:26 pm

I wondered this too. I can only find one wire (white). There should be two.
Mines a '58. what's yours JR?

Post by **DaveC** » Sun Dec 30, 2007 6:31 pm

If it's the green wire it should go to a rubber bullet junction (4 wire) just above in the wiring. The junction also has 3 other green wires in it. Tracing it back it should go to the voltage stabiliser, live stack side.

Post by **aupickup** » Sun Dec 30, 2007 6:33 pm

one wire goes to earth and the other to supply
my heater has 2 a white and a green, green on mine goes to earth and the white goes to the dash wiring

if fitting an alternator it sometimes helps to change these round

Post by **jollyroger** » Sun Dec 30, 2007 6:35 pm

It is a black wire, the green wire coming from the switch is connected to earth via the mounting bracket. I have tried two connectors above already. I'll try and have a look in the morning for a another bullet connector.

Post by **DaveC** » Sun Dec 30, 2007 6:46 pm

Ah I have just been out to check, and the green does in fact go to the switch then to earth. The Black wire goes to the Green stack, reckon it's been changed round at some point as AU says.

Post by **RogerRust** » Sun Dec 30, 2007 7:48 pm

My 61 has two black wires going to the heater one goes to earth the other to a bullet connector in the drivers glove box area.

Post by **aupickup** » Sun Dec 30, 2007 9:54 pm

it seemed they did differ, but all worked of course, you can as a last resort connect the supply to one of the toggle switches, say wipers i think, i seem to remember a van of mine was wired that way

Post by **bmcecosse** » Sun Dec 30, 2007 10:17 pm

No need to swap the wires round when changing polarity - the motor is series wound and runs same way with either polarity.

Post by **jollyroger** » Mon Dec 31, 2007 1:17 pm

Thanks for all the advice guys. I managed to find the original connector above the dash - I had been looking too far over. It is now all back together and working.
What a difference a new matrix has made, I also changed the stat to 88 and blocked up the fresh air intake - nice and toasty.

Post by **bmcecosse** » Mon Dec 31, 2007 4:40 pm

Ah but you should keep the fresh air pipe open - you need fresh air to clear misty windows and combat leaky door seals!

Post by **Kevin** » Tue Jan 01, 2008 11:32 am

you need fresh air to clear misty windows

Thats what quarterlights are for