[Healeys] New Heater Matrix

Michael MacLean rrengineer.mike at att.net
Thu Nov 15 23:03:55 MST 2018

Michael,     While I am sure your explanation is correct, I am confused when looking at my heater.  I do not see the "studs" you refer to.  As you can see in the pictures there are four wires coming from the back of the motor frame all out the same rubber ferrule.  I can tell the two wires with the plastic sheath are the 12V power wires.  The other two must connect to the rheostat switch.  The wires from the switch must exit out of the rubber ferrule at the top of the cover as seen in the picture.  This kind of confuses me as the switch wires must pass very close to the blower fan blades to exit the top of the cover.  It's tough when you don't have an example to go by.  Of course the wiring diagram only show two leads going to the blower motor for 12V power.  You can see how I'll fitting the clip is in the top view picture.

Mike M

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  On Thu, Nov 15, 2018 at 7:07 PM, Michael Salter<michael.salter at gmail.com> wrote:   Mike many thanks for the candid report. Very much appreciated. The wiring is quite simple as the rheostat is simply wired in series with the motor ... that easy.There should be 3 studs on the back of the heater, 2 at the top and 1 at the bottom.The upper pair go through holes in an "L" bracket on the top of the heater cross duct and one through the heater duct which is accessed through a hole in the firewall into which a rubber plug is fitted after installing the heater.

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