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Sun Oct 22, 2006 8:45 pm
Sussex
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490
Wed May 30, 2012 12:14 pm
United Kingdom
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2120
Sun Dec 02, 2007 6:19 pm
Jersey C.I.
jon_viola wrote:My rad fans are on permanently from the moment the battery is connected.
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2120
Sun Dec 02, 2007 6:19 pm
Jersey C.I.
jon_viola wrote:My temp gauge has also packed up- are the two related?
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Sun Sep 28, 2008 4:25 pm
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Wed May 30, 2012 12:14 pm
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Sun Dec 02, 2007 6:19 pm
Jersey C.I.
clee wrote:Does it not have twin relays already ? Up the rating ?
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5602
Thu Apr 15, 2004 12:33 pm
Fleet, Hampshire
blueg33 wrote:My GTA has twin fans and I will be looking at this. I am also considering wiring one of the unused switches as an override
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Wed May 30, 2012 12:14 pm
United Kingdom
JohnC wrote:clee wrote:Does it not have twin relays already ? Up the rating ?
Of course that throws up more questions than answers.
If an Alp has two OE fitted rad fans, there will be two relays according to the manual/s. However, if after market high performance fans have been fitted as Martin F suggests, one would have to know the running current rating of each fan, having identified that, a decision would have to be made as to whether the OE relays could carry the extra current. If not, I know that Lucas make relays that will fit the Relay sockets of the Alp, and a trawl through their web site should come up with an alternative Relay. However.... Auto relays in general (OE type included) are designed to carry high currents in the range of 20 to 30 amps which should be capable of carrying the current for even uprated fans.
Now..... in Jon`s case, he states "Fans".... it would be very unlikely that the Relays are at fault, as the chances of both relays failing together is very remote. So at the moment, as Lee suggests, my money is on the Rad switch, I would be checking that before I went any further.
There is, of course, another angle to this.... If the Alp was only fitted with one fan from new, and somewhere along the line, someone decided to replace the OE fan with two after market fans and just wired the extra fan across the other, then the one relay would be asked to carry the current of two fans. That just might overload the one relays contacts which, if they weld themselves together, would cause the two fans to run.... just a thought
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