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Re: More Cooling fan (archive)

[ Follow Ups ] [ 5-series (E28) Message Board ] [ Msg. Board FAQ ]

Posted by demet on August 28, 1999 at 00:05:46:

In Reply to: More Cooling fan posted by Garry Russell on August 27, 1999 at 22:20:06:

Since the fan will operate when a/c is on you're getting 12 volts at the low speed wire to the resistor. Correct? The fan is connected on the other side of the resistor. On that terminal you should also have the high speed wire connected as the high speed bypasses the resistor and connects directly to the fan. Here you need to verify that you're getting 12 volts when you jumper the high speed temp sensor connectors. You need to do this first so you can eliminate the wire as the problem. Post your results of this test and maybe we can help you from there. Also clean and replace fuse 14, but since the relay is being activated it's probably ok.

87 528e

: I replaced the high speed relay with a good one and it still clicks when wires are jumped. The fan will run with the a/c on, but will not operate with a fully hot engine. Bentleys leaves me hanging here...

: Garry
: 84 533i
: : I was checking the operation of the cooling fan per Bentleys. When I jump the wires for low speed the fan runs, but when I jump the wires for high speed the relay clicks and no fan operation. Does this indicate a bad relay?

: : Garry
: : 84 533i

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