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Gazza36
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« on: January 27, 2011, 05:31:30 PM » |
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Hi, my rear heated screen is not working, the fuse looks ok although one of the connectors to the screen looks burnt out. Also, the cooling fan doesn't kick in, there is no viscous fan, just wondering if anybody could shed some light? Cheers.
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'92 Carlton GSi 24v Manual
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Gazza36
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« Reply #1 on: March 17, 2011, 03:09:41 PM » |
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Hi, don't really know anything about electrics, if anybody could help I'd really appreciate it, cheers.
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'92 Carlton GSi 24v Manual
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melinx
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« Reply #2 on: March 17, 2011, 04:40:33 PM » |
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Put a meter on the connectors to the rear screen to see if you're actually getting power to it to begin with ( if you haven't got a meter use a 12 volt bulb ) Keep in mind that the auxiliary electric fan doesn't kick in until the coolant gets to 105 degrees ( which is pretty hot  and drops out at 100 ) |
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von-opel
Full Member
Posts: 240
"Broadsword calling danny boy"
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« Reply #3 on: March 17, 2011, 05:10:12 PM » |
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Hi, my rear heated screen is not working, the fuse looks ok
Take a look at the relay...it's up behind the fuse panel. i.e. lie on your back in the driver's footwell & look up. |
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Gazza36
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« Reply #4 on: March 17, 2011, 05:42:38 PM » |
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Cheers, the needle was into the red and nothing happened so I'm pretty sure there's a problem.
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'92 Carlton GSi 24v Manual
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melinx
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« Reply #5 on: March 17, 2011, 07:10:03 PM » |
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Admittedly you seem to have a problem somewhere with the auxiliary fan (does it rotate freely; it's not unknown for them to seize !) but I suggest that you try putting the viscostatic fan back on, mine doesn't pass the carrot test but it takes some pretty severe conditions for it to exceed 90 C.
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CraigP
Jr. Member
Posts: 75
Derby
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« Reply #6 on: March 17, 2011, 07:26:06 PM » |
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This you may already know but just in case ......
As for the heated screen, were you testing for voltage at the connections without the engine running? its worth while remembering that on most models the engine has to be running and the alternator charging light extinguished for the heated rear screen to operate.
Haynes show this interlock to the alternator for 1993 models onwards.
Don't quote me but Haynes are not always correct as pre 1993 drawings do not cater for 6 cyl engines so the interlock may well be on earlier vehicles, it was definatly on my 1988 cavalier and 1985 Nova so I would think it will be on all Carltons.
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melinx
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« Reply #7 on: March 17, 2011, 07:31:45 PM » |
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Admittedly you seem to have a problem somewhere with the auxiliary fan (does it rotate freely; it's not unknown for them to seize !) but I suggest that you try putting the viscostatic fan back on, mine doesn't pass the carrot test but it takes some pretty severe conditions for it to exceed 90 C.
I was assuming that you had the standard Carlton auxiliary fan fitted, but I see that you have a Kenlowe fan fitted so my comments about the switch on temperatures are almost certainly wrong. I know nothing about the Kenlowe modification ! |
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Gazza36
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« Reply #8 on: March 17, 2011, 11:24:59 PM » |
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Admittedly you seem to have a problem somewhere with the auxiliary fan (does it rotate freely; it's not unknown for them to seize !) but I suggest that you try putting the viscostatic fan back on, mine doesn't pass the carrot test but it takes some pretty severe conditions for it to exceed 90 C.
I was assuming that you had the standard Carlton auxiliary fan fitted, but I see that you have a Kenlowe fan fitted so my comments about the switch on temperatures are almost certainly wrong. I know nothing about the Kenlowe modification ! Nor do I lol, it was fitted before I bought the car, but to be honest the only fan I can see is the standard one, it doesn't spin freely no. |
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'92 Carlton GSi 24v Manual
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Gazza36
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« Reply #9 on: March 18, 2011, 07:14:50 PM » |
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Ok, the fuse for the screen is ok, the wiring that joins to the screen has continuity across it, however when the screen is switched on, there is only 4 volts showing, the relay clicks however i am unsure how to check it.
The fan does not spin freely, it looks different to the spare one i have and so may not standard and indeed kenlowe as i was told by the previous owner, i found a fuse for it in the engine bay which had blown, i changed this however it blew again, is it possible to strip the fan and fix it so that it spins? Many, many thanks.
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'92 Carlton GSi 24v Manual
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melinx
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« Reply #10 on: March 18, 2011, 07:45:07 PM » |
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Ok, the fuse for the screen is ok, the wiring that joins to the screen has continuity across it, however when the screen is switched on, there is only 4 volts showing, the relay clicks however i am unsure how to check it.
There is either a bad connection somewhere in the wiring or more likely, a dry joint internally in the relay; you would probably be best trying a replacement relay. |
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Gazza36
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« Reply #11 on: March 18, 2011, 09:41:04 PM » |
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No worries, where should I obtain said item from?
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'92 Carlton GSi 24v Manual
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melinx
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« Reply #12 on: March 19, 2011, 10:47:21 AM » |
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Identify the relay, unplug it and check that the base connections are clean then look for the GM part number on the case. Someone on here may be able to help with a replacement ? Remember when considering this suggestion that I know nothing about the Kenlowe fan installation: Try disconnecting the fan and then see if it rotates more freely; if it does it may indicate an external wiring short, if not it may indicate an internal short  It's very difficult for me to make a judgement as to whether it's partly seized or it's an electrical fault without 'hands on' testing  |
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« Last Edit: March 19, 2011, 11:20:12 AM by melinx »
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von-opel
Full Member
Posts: 240
"Broadsword calling danny boy"
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« Reply #13 on: March 19, 2011, 06:22:39 PM » |
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Part numbers vary with chassis no. However I've always found that if you open it up & re-flow the solder they usually work.....if not...part nos.  |
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Gazza36
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« Reply #14 on: March 25, 2011, 10:56:30 AM » |
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Hi, took the fan off and lubricated it, it now spins ok, is it possible to bridge two terminals on where the relay sits and make the fan spin on demand rather than wait until it is up to temperature, like when testing the fuel pump?
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'92 Carlton GSi 24v Manual
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melinx
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« Reply #15 on: March 25, 2011, 11:29:59 AM » |
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« Last Edit: March 25, 2011, 11:57:00 AM by melinx »
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Gazza36
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« Reply #16 on: March 26, 2011, 09:06:45 PM » |
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Hi, thanks for that, it's a green 30 fuse which was ok when it was working so we'll see how it goes, cheers again.
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'92 Carlton GSi 24v Manual
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Gazza36
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« Reply #17 on: March 28, 2011, 08:02:57 PM » |
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All sorted, turns out it probably isn't a kenlowe, bridged two of the connectors where the relay goes and she span up lovely, thanks all.
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'92 Carlton GSi 24v Manual
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