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Ozzie · Posted: Sun Mar 16, 2008 1:38 pm Post subject: Blower fan Relay

I've looked throught the book and elsewhere and which one is it?
The top left one is a cooling fan relay and I've sussed the fuel, wiper and turn relays.

This is for an '84, similar to a 944 of same vintage and maybe 924S.
All the others I've looked at for 924 are wrong.
_________________
Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

Smoothie · Posted: Sun Mar 16, 2008 1:58 pm Post subject:

If it came with factory AC, there'd be a couple more relays behind the glovebox.
My upper-row-third-from-left, I have as "air conditioning system" - that might actually be the fresh air blower - http://www.924board.org/viewtopic.php?t=18560
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

Smoothie · Posted: Sun Mar 16, 2008 2:21 pm Post subject:

No, on second thought (and a look at the diagrams), "air conditioner relay" appears to be just that and controls a "fresh air blower interlock relay" that apparently cuts power to the fresh air blower, and sends power to the evaporator fan (aka- "AC Blower Motor"), and completes a ground to activate the "cooling fan relay" to switch on both radiator cooling fans when the AC is switched on. "Air conditioner relay" and "cooling fan relay" are on the main fuse-relay panel. -So now I'm thinking the two relays behind the glovebox are the "fresh air blower relay" and "fresh air blower interlock relay".

_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

Ozzie · Posted: Sun Mar 16, 2008 3:33 pm Post subject:

The car was not originally fitted with AC so I am looking for the relay to interlock with the AC and switch it off when it is on.
(I am fitting the extra relays elsewhere)
It should be on the relay board but no pictures telling me which one.
I am thinking of switching the earth on the fan switch via interlock relay if I cant find the normal relay.
_________________
Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

Ozzie · Posted: Mon Mar 17, 2008 8:36 am Post subject:

Anyone else have any ideas?
_________________
Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

Smoothie · Posted: Mon Mar 17, 2008 12:52 pm Post subject:

Turn on the fan, then pull relays until the fan stops?
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

Ozzie · Posted: Mon Mar 17, 2008 1:08 pm Post subject:

I have all the electrics apart at the moment or I'd do just that.
I have altered the interlock to open the earth line on the blower fan now.
Relay should stay on but fan wont run.
_________________
Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance