When should my engine (scavenger?) fan come on?

[Wedge]

I've just fitted a Mason Alarm, brilliant piece of kit. In doing so I've been driving up and down a mixture of roads to check it was working.

What I have noticed is that when I parked up, I could hear a single click coming from what appears to be the drivers side, and this has got me to thinking that the engine fan isn't coming on! The temp gauge is just below 1 o'clock.

The radiator fan comes on when I have the air-con on, is this normal? I lifted the passenger side seat up to see if the fan was moving, it wasn't.

Maybe the Bongo isn't hot enough for the fan to come on, maybe it is.

I'm at a loss

Any ideas?

[nfn]

The radiator fan should always be on when the a/c is switched on.

It can take a lot of driving to get the engine compartment hot enough for the scavenger fan to come on -- I've managed it (and noticed) only a few times in the summer in the UK in 30,000 miles of bongo ownership. You can test if it works without getting the engine compartment hot, but I'm not sure which wire you need to ground to test it -- try doing a search on this list.

[lizard]

I have never had mine working except for testing to see if the motor works.

[renegade]

Hi, you can test to see if your scavenger fan works by removing the centre consol, the grey panel arond the gear lever and disconnecting the thermo switch that controls the fan, it should start working shortly after. You will notice the warning light on the dash will flash, this will go out when you reconnect the switch. The switch/sensor is to the right of the hand brake lever. hope this helps.

[splitpin]

Hi, you can test to see if your scavenger fan works by removing the centre consol, the grey panel arond the gear lever and disconnecting the thermo switch that controls the fan, it should start working shortly after. You will notice the warning light on the dash will flash, this will go out when you reconnect the switch. The switch/sensor is to the right of the hand brake lever. hope this helps

Does ignition need to be on for this test renegade?
Thanks

[renegade]

Hi Splitpin, when i tested mine the ignition was on, but the fan can run when the engine bay is hot when the ignition is off, as the fan is, i think ECU controlled.

[splitpin]

Hi Splitpin, when i tested mine the ignition was on, but the fan can run when the engine bay is hot when the ignition is off, as the fan is, i think ECU controlled.

Thanks renegade, will give it a go as have never heard either engine or radiator fans working on mine. Except when aircon is on then radiator fan switches off and on.

[Wedge]

Thanks for the replies chaps, excellent advice as usual

Will give this a go

[Wedge]

Well I disconnected the switch, got no warning light in the dash, and the fan didn't come on. I tried this with the ignition on, and then with the engine running.

Still no fan

I've checked the fuse in the bonnet area, and it looks like verdigris on the metal in the little 'window', could this be the problem?

[renegade]

Cleaning any electrical contact[s] is always a good start, if this does not resolve the prob, then its a case of following the wiring/wiring diagram from the fuse to the fan to see if there are any dodgy sections in the loom. Just out of interest, can you spin the fan manually ?.

[Wedge]

Got the fan to work by unplugging from the sensor and placing a thin piece of wire on the connector. This was done with the ignition on.

So, the fans work and I would assume the wiring is okay (bear with me, I'm no sparky!)

That leaves the sensor. How can I test the sensor? I did think of something silly like blowing a hairdryer near it to simulate a HOT engine. I've looked at Bingobits (everyone's calling 'em Bingo's now), and a new sensor is around fifty quid!

[Doone]

Dandy had a go at this a while ago. 'Search' and you will find. SCAVENGER FAN SENSOR TEST

[mikeonb4c]

Got the fan to work by unplugging from the sensor and placing a thin piece of wire on the connector. This was done with the ignition on.

So, the fans work and I would assume the wiring is okay (bear with me, I'm no sparky!)

That leaves the sensor. How can I test the sensor? I did think of something silly like blowing a hairdryer near it to simulate a HOT engine. I've looked at Bingobits (everyone's calling 'em Bingo's now), and a new sensor is around fifty quid!

Why not fit a new fused feed direct and a manual switch. Then you can choose when you want it on, plus save your dosh

[Wedge]

Why not fit a new fused feed direct and a manual switch

What parts would I need Mike?

And more importantly, how easy would it be?

[mikeonb4c]

Why not fit a new fused feed direct and a manual switch

What parts would I need Mike?

And more importantly, how easy would it be?

I did a cheap job using switch. 15amp fuse holder and wire all of which was surplus from a spotlamp kit I bought. See this thread for details:

http://www.igmaynard.co.uk/bongo/forum/ ... =scavenger

However, the switch can get a little hot and if doing it properly I'd use a relay and take the switching supply from an ignition 'live' feed so fan would only work when ignition/engine on. It's an easy job as long as you have a multimeter (just to check what is what) and a bit of sense. Disconnect battery while fitting, for safety.