Hi Rick.
It was my story on Skye's idea. After I posted the 'fix' I got the tip to
check the internals of the heater switch.
I did. And guess what? It was etremely corroded. After I cleaned it, I also
connected the direct plus to the motor, with the switch in the on position.
There was hardly any difference noticable.
The wires that are combined with the motor are:
The general plus behind the facia. I guess there is hardly any loss of power
there, since it is all over.
The ground of the motor. I don't know about that one.
The wire between the switch and the motor, and the switch. There are no
jumpers in between, so there can hardly be any power loss there.
The current is very high, so the chances of loss a huge. I like what you did,
but I'd ratcher stick to originality.
Greetings, offcourse no offence.
Rene
Rick Morrison wrote:
> FWIW Department:
>
> Not to long back, a lister posed the question about installing a relay in
> the heater blower circuit, and it's effect on the speed of the blower
> motor. (sorry, can't remember exactly who originated the thread)
> I haven't been exactly happy with the heater blower on my GT for a long
> time, so I thought I'd give it a try. Used a relay from a aux. driving
> light kit and installed it, mounted next to the heater box, on the
> firewall.
> There is a marked increase in the speed of the motor with the relay in
> place. To double check, I pulled the fan switch wire from the relay and
> jumpered to the motor + wire. The motor speed audibly decreased, but
> immediatly raised again when the relay was re-connected.
> Not being an electrical genius, I can only surmise that the skimpy
> wiring to and from the fan switch and to the motor simply isn't
> suffecient to carry the current. With the line power circuit through the
> relay now being 10 ga. wire, it seems to work much better. As a side-bar,
> I've also noticed the voltage drop, as registered by the on-board voltage
> meter is much less than before. Pre-relay, when I turned on the blower,
> the voltmeter would drop by 1 1/2 - 2 volts. Now it's somewhere in the
> range of 1/2 v.
> Am I correct in my assumptions? Or is there something else that I might
> be missing here.
>
> Rick Morrison
> 72 MGBGT
> 74 Midget
--
Rene and Marion van Maanen
Netherlands Europe
SOHC/4 sohc4@dorje.com Honda CB350F ['74] member #252
Honda CB750K2 ['75]
http://members.tripod.com/renevm/cb750k2/index.html
MG list mgs@autox.team.net MGB GT ['68]
http://members.tripod.com/renevm/mg/index.html ring #119
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