1.4 12v Bravo '98.
My AC never worked but today i went out to try to find out why.
it turns out that the wire that comes to the compressor in the engine bay doesn't have any voltage on it when the ac button is pressed or otherwise.

this tells me that there is an electrical problem on the circuit.
probably a fuse or a relay.

i have tried to see if the compressor engages, making a direct link to the battery "+" and YES it does. so the compressor is fine.

I need to know where all the relays and fuses of the AC system are, ( what colors.. etc a picture is worth a thousand words).
One more question:
When the ac engages the fan on the radiator should also start to rotate even thou the engine is not at optimum temperature?

I would appreciate any help in solving this problem.

I didn't even know the 1.4s had AC,

Does the AC PUMP not have its own belt driven pulley system like the ones on the 1.6 and 1.8s basically the same belt that drives the alternator and Power steering..

I have the Fiat service manual so will have a look see what i can find i'll reply with more info soon.....

of course it has a pulley that is driven by the same belt as the alternator.
the car is a 1.4 sx(whatever that means)

but the pulley on the ac compressor doesn't engage the ac compressor until it receives a signal (that meaning the AC button is pressed)

just found out there is a possibility that there is a pressure valve that might stop the compressor from engaging if there isn't enough pressure in the system.
where might that pressure valve be?

Hello

I think the fuse and relay is in the little box infront of the battery tray. Iim not 100% sure, the diagram suggest so.

These may also help.

aurick86 said:

just found out there is a possibility that there is a pressure valve that might stop the compressor from engaging if there isn't enough pressure in the system.
where might that pressure valve be?

Click to expand...

The compressor clutch is controlled by a three stage pressure switch, situated on top of the filter/drier. Item 121 in the above diagrams.

this is what i have in the little black box in front of the battery.
what do you think is missing ? if anything (p.s. i don't have ABS)

as you can see i have 2 fuse holders with no fuse in them and a relay socket with no relay.
what do the other relays belong to?

aurick, pressure switch is behind the bumper on the passenger side on top of the big silver cylinder (filter/dryer thing) - follow the pipes

does your bravo have a digital odometer and auto climate control? if so, there's a diagnostic procedure....

https://www.fiatforum.com/bravo-brava/146269-aircon-problem.html?p=1536114

will try to find the pressure switch,
No digital odometer, simple analogical one, and no auto climate control.

Nedge his car can only be a mk1 with analogue odometer, because it has a 1.4 engine.

Aurick my 1.4 had those empty two fues blocks and relay block aswell, I think its for the abs since most 1.4's dont have abs.

ah didn't realise they phased them out for mk2, my bad

Nice one AB will those wiring diagrams i was looking last night but gave up air Adobe would not give me any results on a ctrl+f.....

nedge2k said:

ah didn't realise they phased them out for mk2, my bad

Click to expand...

Its not a problem at all nedge the 1.2 replaced the 1.4 when they changed mk's

Your welcome Karl