Oil cooler fan relay
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Joined: Feb 2003
Posts: 10
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From: United Kingdom
Oil cooler fan relay
having trouble with my oil cooler fan on my 88' flatnose turbo cab. Didn't even realise I had a fan until recently but can't get it to work anyway. Have tried the various fan help threads but my problem is slightly different. I have no power to pin #30 of the relay. The fan will work if I supply power to this and then a jumper to 87. I've tried fuse #2 and that's OK (Even pulled it and the seat motors stop so it is taking power.
It seems that somewhere back of the fusebox from fuse 2 to pin 30 there's a problem. I've tried pullling the fuseboard away from the wing as far as it will go but it's pretty tight back there and all the cables to the relay are wrapped anyway.
Has anyone any ideas? I don't want to fiddle too much and find I've knackered something else. Thanks in anticipation. Gray.
It seems that somewhere back of the fusebox from fuse 2 to pin 30 there's a problem. I've tried pullling the fuseboard away from the wing as far as it will go but it's pretty tight back there and all the cables to the relay are wrapped anyway.
Has anyone any ideas? I don't want to fiddle too much and find I've knackered something else. Thanks in anticipation. Gray.
Rennlist Member
Joined: Oct 2003
Posts: 282
Likes: 14
From: Marietta, GA
Gray,
I don't know how different the oil system is in the slopenose turbo but, in my 88 cab I believe there is a temperature activated switch in the oil line to the front oil cooler that operates the fan relay when the oil gets hot enough. I don't remember if it is located up front by the oil cooler or at the rear in the valve that diverts the oil to the front cooler when needed. I'm at the office right now, otherwise I'd check my Bentley manual. (And as you can see I'm getting alot of work done being here!). If you have a Bentley manual it has pictures and diagrams of the oil system that will help you troubleshoot. If not I'll check and follow-up when I get home.
There might be a problem with that temp switch or the switch and relay are fine and your oil just might not be getting hot enough in the winter to need the fan.
Andrew
Update- The temp switch is in the front oil cooler. But, this might be completely useless info for a turbo/slopenose.
I don't know how different the oil system is in the slopenose turbo but, in my 88 cab I believe there is a temperature activated switch in the oil line to the front oil cooler that operates the fan relay when the oil gets hot enough. I don't remember if it is located up front by the oil cooler or at the rear in the valve that diverts the oil to the front cooler when needed. I'm at the office right now, otherwise I'd check my Bentley manual. (And as you can see I'm getting alot of work done being here!). If you have a Bentley manual it has pictures and diagrams of the oil system that will help you troubleshoot. If not I'll check and follow-up when I get home.
There might be a problem with that temp switch or the switch and relay are fine and your oil just might not be getting hot enough in the winter to need the fan.
Andrew
Update- The temp switch is in the front oil cooler. But, this might be completely useless info for a turbo/slopenose.
Last edited by AJ88CAB; Feb 22, 2004 at 11:44 PM.
