Hi Jim,
I just answered your PM, Thanks again for the theory lesson.
OK, here goes.
First paragraph: When measuring voltage across the terminal I got nothing, when checking current, I also got nothing.
Third paragraph: with the blower on I got 11.5 on both legs. If I use a test light, the terminal connected to the positive wire was brighter.
sixth paragraph: I remove the non positive wire and the voltage was the same on both legs. I also took the test light and hooked it up to a positive terminal and put the probe to the wire and got no light, so I think that is one of my problems.
Seventh paragraph: solenoid did nothing. The way I have been testing the solenoid is connecting a vac pump to the one side of the solenoid, pump it up to 20, and a vacuum gauge end of the line at the heater hose vacuum valve. Turn the blower motor on, and nothing, vacuum holds on one end and remains zero at the gauge.
So i am thinking I need a new solenoid and trace that wire to where it is supposed to be grounded. Under my dash is so crowed I cant see a thing.
Is this the one, looks the same to me.
http://ambulanceparts.com/electricva...dsolenoid.aspx
or
http://www.fixmyambulance.com/produc...%2052-0161.htm
As far as the connections are concerned, does it matter which side of the heater core is the "in" and which is the "out"?
Is there a need for this solenoid and the vac operated water control valve? Could I just use the manual operated valve in the hose going to the inlet side of the core. Why the original owner/ builder put a water control valve in the hoses to
both sides of the heater core, I have no idea...am I missing something here?
Thanks...Dave