1992 VP Cooling Problems

[MikeC]

The ALDL is a loose 6 pin plug hanging from the main loom that's hidden to the left of the glove box. It will have a row of 4 connectors with 2 connectors under it separated by a clip that's meant to hold the plug from a GM Tech 1.
You need to connect the two pins on the right side- a black wire and a black/white wire. I use a bent paperclip for this.
With the ignition on and the engine on it will flash a code through the check engine light. These flashes will tell you the state of the faults stored in the ECM.
Note for a 5L there is no specific flash code for the A/C fan but if the ALDL terminal is earthed the A/C fan should come on. I don't know exactly what happens with a V6 but I would suspect all fans should come on.

 

[FXST01]

Does the fan actually work?

 

[Trevor loves holden.]

Well if the temp gauge not working then you should try replacing the Sensor or see if it has a good contact first.

 

[MikeC]

Does the sensor that tells the ECM to switch on the fan work and is it connected?

 

[Darcy Warhurst]

To answer the questions, the fan does work (I've powered it up using a small 9v battery pack i had), the temp sensors are an unknown if they are dead but I've checked the connectors to the ECM one and it is fine, i cleaned some green gunk of the spade connector for the gauge sensor but that didn't do anything.

I've tried to get new sensors, but since i don't have a license yet and my dad won't take me to autobarn or supercheap I'm stuck for a while.

 

[VPRob]

I would think replacing the 2 sensors would be a good next step. One sensor feeds the dash gauge and the other the ECM. I guess that if the sensor that feeds the ECM is faulty that would stop the fan cutting in. You already know the dash sensor works, at least to some extent but I would replace both. Plenty of them on evilbay that will be delivered to your door.

 

[Darcy Warhurst]

I would think replacing the 2 sensors would be a good next step. One sensor feeds the dash gauge and the other the ECM. I guess that if the sensor that feeds the ECM is faulty that would stop the fan cutting in. You already know the dash sensor works, at least to some extent but I would replace both. Plenty of them on evilbay that will be delivered to your door.

I'll see what I can do, I've got some other unrelated questions, My speedo doesn't work and neither does the fuel gauge, What could that be? I dont't think the cluster is dead (Guage for the temp works when ever the car is at 20 billion degrees)

 

[FXST01]

https://forums.justcommodores.com.au/threads/solution-to-sticky-fuel-temp-guages.15436/

 

[Trevor loves holden.]

Have a look at the plug connectors maybe not clicked in or dirty contacts.

 

[Darcy Warhurst]

Have a look at the plug connectors maybe not clicked in or dirty contacts.

Its been a bush basher for ages so idk whats going on, could the speedo cable be broken at the sensor?

Sorry if i sound like a complete dumbass, I'm just getting started with cars.