1997 BMW Z3 Fuse blowing for air cond. BMW Z3

STEVENH21

MEMBER
1997 BMW Z3
4 CYL
2WD
MANUAL
48,500 MILES

Air cond system has 3 fuses. One, the smallest 7.5, has blown twice. What might be the cause of this and what is the next step to take?

Monday, August 10th, 2009 AT 1:13 PM

4 Replies

DOCHAGERTY

MECHANIC
9,601 POSTS

What number fuse is blowing?

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Monday, August 17th, 2009 AT 8:27 PM

STEVENH21

MEMBER
2 POSTS

#39. Goes to the compressor relay. Relay has continuity on the control circuit. Can't really test to see if switch is closing. Guessing either bad relay or compressor drawing too much power. Fuse blows from 3 blocks to 1/2 mile with air on, then air cond. Stops.

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Monday, August 17th, 2009 AT 9:27 PM

DOCHAGERTY

MECHANIC
9,601 POSTS

I will get the wiring diagrams and we will get it fixed, I will repost in the morning mate. � � �

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Monday, August 17th, 2009 AT 10:01 PM

DOCHAGERTY

MECHANIC
9,601 POSTS

You called it right, the only thing on that circuit is the compressor control relay and your guess of the mag clutch or the relay itself being the culprit is quite possible mate. Run some current draw tests and see what the magnetic clutch is pulling.

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Tuesday, August 18th, 2009 AT 6:38 PM