After messing with my non-working central locking system today, I got an idea.

Someone had cut the wires inder the dash which provide 12v and ground to the pump (my alarm buzzer is also missing). After a bit of fiddling, I got 12v and ground to the pump, only to find no signal from my door locks.

I'm assuming that the missing wires are also preventing 12v getting to the door switches.

Since I want to do a keyless entry, I got to thinking, why not just set up a system in the trunk with two relays to provide either the 12v or the grounded circuit between the pump power and the three-pronged switch on the pump.

The double pronged connector is always hot. The three pronged connector has either 12v at all three connections (Two front door switches and trunk switch) or Ground at all three, depending on whether the key switch is in unlock or lock position.

I reckon a remote/relay setup in the trunk will work, and won't give a rat's butt whether the key switches are working or not.

As long as my system holds vacuum (which my Mityvac show it does), this should work, yes?

Or am I being a nebbish again?

Any and all electrical types please comment on this.

TIA

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1998 E300 +310,000K
1996 E300 +460,000K