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  1. 04-19-2009 03:57 PM #1
    clinta74
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    86 535i Is there a heater/AC blower relay?

    The heater and AC blowers just quit. There is power at the fuse, but the AC button doesn't light and neither motor runs.
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  3. 04-19-2009 07:17 PM #2
    ROYinGA
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    Look up the wiring diagrams at e38.org/e28.

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  4. 04-19-2009 07:42 PM #3
    clinta74
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    Re: Look up the wiring diagrams at e38.org/e28.

    Thanks same diagrams in my manual. No relays.
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  5. 04-21-2009 12:48 AM #4
    ROYinGA
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    The only relay I know of is a small one which is

    mounted on the small PC board which is inside of the AC Temp control. It controls the compressor clutch.
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  6. 04-21-2009 08:22 PM #5
    clinta74
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    Re: The only relay I know of is a small one which is

    Thanks. The way that it died it acted like a relay, but could be a broken ground.
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  7. 04-21-2009 11:10 PM #6
    ROYinGA
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    My AC clutch coil shorted and fried the relay

    inside of the temp control.
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  8. 04-24-2009 01:52 AM #7
    gomamma
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    Re: 86 535i Is there a heater/AC blower relay?

    Go out and look at the fuse for them. There is a heat meltdown problem in that fuse area. No real relays to speak of. But a wiring diagram is really no use. On these cars a person who knows what they are doing rarely has to get out a wiring diagram.
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  9. 04-24-2009 04:06 AM #8
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    Re: 86 535i Is there a heater/AC blower relay?

    prolly the switch leads would be the next place to check for 12v
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  10. 04-25-2009 11:56 AM #9
    clinta74
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    location?

    is this the temp control?
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  11. 04-25-2009 05:05 PM #10
    ROYinGA
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    The little black box near your right knee with 6

    pins. Left side of console back of temp dial and AC switch. It has a PC card inside with a small relay which works the AC compressor clutch.
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  12. 04-29-2009 02:12 AM #11
    gomamma
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    Re: 86 535i Is there a heater/AC blower relay?

    AGAIN I say.. Look around the fuse box right where the fuse is. If its look smelted down crack open the fuse box and look for heat damage.
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