Alternative remote entry system for 210/211 alarm system

[tonyfirshman]

My model is 1997 940 with 210/211 alarm.
This tip means losing the alarm but who needs an alarm on a 15 year old (at least) Volvo (8-)#

I was unable to program a new Volvo sourced replacement fob and then lost my *only* original one. Apparently they are now incompatible, as they couldn't even manage using their re-programming device, so needs a new compatible alarm unit. Cost me £60 for their time!

I have connected a dual output remote ( http://tinyurl.com/bn4gpp9 ).
The receiver has two open collector outputs, each supporting 100ma GND sink. The Volvo lock control unit uses well under that - less than 20ma momentarily. Brilliantly, the Volvo unit (separate lock and unlock) requires GND shorts to actuate, so nothing else is needed.

Do the following to connect the receiver unit, using flat spade connectors on the leads.

Remove and discard 210/211 alarm unit (behind glove box on mine).
Connect appropriate plug spade connectors to the receiver unit leads. ('lock' connector needs cutting narrower) and make one spade to spade lead.

Plug into the vacant 210/211 sockets as follows:

Spade to spade to 50E 50F to enable starter solenoid
Power - 30K (red)
GND - 31 (black)
Lock - AL2 (yellow/black - narrow connector. My 940 alarm schematic has white/black)
Unlock - ATR (Green/black)