Central Locking works through trunk only, front doors doesn't unlock

[daruma3gakoronda]

89 325i sedan Central locking stopped working one day. Both front doors lock and unlock with the key, but central locking does not work.

However, it works no problem from the trunk.

So I figured my central locking control unit might be bad and ordered a brand new one from BMW, and also cut the wires going into the door, as the RTS Auto article recommended.

However, no change. Things are the same. Key unlocks both front doors independently, but the trunk can central lock. What should I try next?

[reelizmpro]

Clean the door jamb connector terminals.

[e30mobber]

do you windows work/intermittently? when my driver side window began acting up, i unplugged the door jamb harness as stated above , clean with electrical contact cleaner, and presto, all working again, since its all run through that harness it would probably help> good luck

[packratbimmer]

Especially on the driver's side, the external parts of the lock tumbler are prone to disintegration. Also, the small switches that are associated with left and right locks could be bad or are not being actuated.