Aux Air Valve Voltage Question.

[84Westy48]

Hello Samba,

1984 Westy.

I have read a number of posts on this subject but I am not quite sure where the voltage comes from to power the AAR. If I turn the key on and check the voltage of the two leads I don't get any voltage. Should I be getting voltage from the two leads in the plug?

Is this unit on a separate circuit breaker?

Thank you,
John

[Wildthings]

It is power via the fuel pump relay so will have power under the same conditions as the fuel pump:

1: Momentarily when you turn the key to the run position

or

2: When the engine is cranking and/or running.

[jlrftype7]

So, voltage on one wire, and ground on the other to complete the circuit. Wiring diagram shows White wire as power spliced off the Injectors Power wire, and Brown/Yellow as the ground wire. Ground point is #18 , which is the bolted eyelet connection at the top of the Left Cyl head[ drivers side].
Might be a bit hard to see and work with if you have A/C Compressor installed, as the Compressor hides the wiring a bit.
_________________
'68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto

[84Westy48]

I will check it with the engine running. Thank you.

[84Westy48]

Good info. Checked while engine running and had power. Took the AAR off and checked using separate leads. Closed within two minutes.

Trying to determine why the Westy runs better with the 02 sensor disconnected.
eliminating potential causes.

JM

[jlrftype7]

[SCM]

[84Westy48]

I had a chance to work on the Westy. Ultimately trying to resolve the lack of performance once the van warms up. Once warm the van hesitates off idle and through the normal range of RPM's. I replaced the aux air regulator with one that's was tested. No change. Reinstalled the original reconditioned distributor timed and 35 BTDC and 3000 RPM. No change. Changed the temp 2 sensor. No change. Checked the function of the single micro switch on the GoWesty throttle body. No change. Decided to disconnect the 02 sensor. The van ran better than it ever has... Now I need to determine why. I replaced the ground wire to the engine and cleaned the remainder of the brown leads.
I replaced the 02 sensor with a new one. Still runs anemic when connected.

A classic example of throwing parts at a problem.

Plan to take it to the Buslab tomorrow to have the upper and lower ball joints replaced, will have them look at it. defeated after a long stretch of trouble shooting.

I checked the compression and all four cylinders measured 165 psi.

-John

[84Westy48]

Thanks for all the help! Will post once Buslab takes a look see.