Fuse Box

[betsy325e]

Dear 30-30-somethings,

I have a bad connection, so far as I can tell, running from my low-speed fan wire to the low-speed fan relay on the board...or maybe a bad diode that runs from there to the A/C sparky bits. (No continuity from low/speed switch wire on radiator to 86 on the low speed relay connection)

Has anyone taken the fuse box apart? It seems rather daunting, but it drives me crazy that the fan doesn't ever kick on. The e30 electrical troubleshooting manual doesn't seem to tell you much other than there are various connections on the back side of the board. Or maybe it just looks like it would be a huge pain in the ass, but it's not so bad? Is there a good DIY or something somewhere?

Thanks,

J.

[vpilarrt]

You don't have to "take it apart". Remove the 3 screws (1 of them is under K4) holding the top section of the fuse box to the lower section. You can lift the top section up enough to see the wiring and circuit board, look for burned wiring or traces.

[betsy325e]

Thanks man. Not so scary sounding haha

[arch4ngel]

Once the board is apart there are two plastic pieces holding the connections in place.
They can be easily removed with a screw driver from the top (make sure your battery is disconnected obv). Then the internal 'clip' can be detached to remove the connector.

I can't remember the part number but you can order new connectors. The part number can be found on realoem.com.