TheSamba.com :: View topic

Tue Apr 17, 2012 7:50 pm

I keep burning up the voltage regulator in the idle control relay, it there an upgrade for the replacement part. every time I turn on the a/c it burns the Voltage regulator. Is there one that will tolerate the a/c being turned on.
hy is that a/c popping the relay??

Thanks
Steve

Wed Apr 18, 2012 8:14 am

something funny going on, the idle controller does get a signal when the ac is on, so that idle speed can be increased to allow for the extra load of the ac, kind of like it get a singal form teh power steering pump when the pressure is high (pump working hard).

I'd look to see what signal the AC is actually sending to the idle controller, I am not sure what the signal should be, but It maybe is supposed to be a gorund being made?

anyway see what the ac signal wires is sending when the ac is switched on.

Wed Apr 18, 2012 11:59 am

How much current can the Amplifier handle? is there a replacement part which can handle the current? right now I'm using a NTE185 it's rated 80-80-5volts 4A, PD 40W would the NTE36 work at 140 a 12v ??
Where does the A/C signal come from?? I think the signal is not grounded, it is a positive signal.
What else is sending signals to the relay besides the A/C and P/S and Temp sensor?
Sorry for all of the questions
Steve

I think I'm going to try the NTE36, I have no idea what the results will be, if someone knows please stop me if I'm wrong!!

Thu Apr 19, 2012 9:08 am

How electronic experts will swapping the Amp work??

Thu Apr 19, 2012 9:45 am

You mean the output transistor? The large transistor is not a "voltage regulator" per se, although it does look like one.

I suspect that there is something wrong with the idle stabilizer valve itself. Maybe it has an internal short. Does the Bentley have a resistance specification for this component?

Try this: Unplug the idle stabilizer valve, and then turn on the A/C. Does the transistor get hot? It shouldn't.

The NTE185 is a PNP transistor. The NTE36 is NPN. These are not compatible. I don't recall what transistor I used when I repaired mine 7 years ago, and I don't have a stock engine anymore.

Thu Apr 19, 2012 9:56 am

You are correct on the part description
I'll try your suggestion this afternoon if I have time

Thanks

Thu Apr 19, 2012 11:19 am

Have you pinned the A/C and fuel injection harnesses and made sure each terminal is in the proper location in the plastic connectors?

Frying ECUs and now ICMs :?: :?: :?:

Are you using all D series parts including the wiring??

What year is your van again???

Sounds to me like one of the grounds is hot and backfeeding when you turn on the AC.

I am throwing away a complete rear AC unit with column wires...you want it?
I also have a complete AC unit still in a van. You can have it if you pull everything, I have no interest in it or time to part it.

Fri May 04, 2012 6:02 am

What is the difference between the "B" idle control unit and the "D" version? I just replaced my "B" with a "D". The valve hums/vibrates and the engine idles fine now.