I bought an Alpine 8121 alarm brain off of ebay. I bought it go with my theme of using Vintage Alpine equipment in my install. It came with no wiring diagrams however. Alpine has not been able to help me, and my local dealers are asses who refuse to help anyone usually.
Does anyone have a wiring diagram or parts list for an Alpine 8121 Alarm. Pac Parts has not been much help either.
Thanks guys
Zach Hartwell
Have you looked in the members wiring & info upload forums, which have a few Alpine units listed?
Regards
EVIL Teken . . .
I cant seem to find any Alpine units listed..im very new to this forum..could you point me in the right direction. I'm in the part, just not seeing Alpine units.
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Zach Hartwell
1985 Chevette
Alpine Source
Panasonic Eq
About it for the time being..
Zach,
Talk about vintage. I still have an old book from Alpine (1987 installation guide) that has some info in it about the 8121 system. Here's what it had inside.
Yellow wire: battery 12V with 20A fuse
Red wire: ignition 12v
Black wire: ground
BLACK/ White wire: negative door switch
BLACK / YELLOW: positive door switch
RED / black: negative trunk switch
RED / yellow: positive trunk switch
Orange: positive 12V out to starter cut relay
Blue wire: siren 12v output
Green: hoodlock 12V output
White: light flash negative output
WHITE/ brown: door lock output (may be unlock though)
WHITE/ yellow:door lock common (goes to 12v or ground depending on wiring)
WHITE/ green: door unlock output (may be lock though)
I also remember that they had internal code chips in the main brain and also in the remotes. Make sure they are all coded the same.
I think those systems also had the numeric keypad to allow you to set up the system and it plugged into an 8 pin din cable on the main brain. I don't know if you need that or not to get it working.
The system also had little microphone sensors (still have one mounted on my car) that I think were a mini plug and you could Y off and add more sensors if needed.
The manual I have also shows an internal memory reset button.
There was also a cover on the backside that had fuses underneath of it.
I hope the above helps some. I may still have an older manual that gets more specific somewhere (i kept a lot of that old stuff) and if I do I'll try and remember to add more info here on this site.
Jim/Saint Louis
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1968 Chevy II Nova Garage Find 2012
1973 Nova Custom
1974 Spirit of America Nova
1973 Nova Pro-Street
Zutronius wrote:
What else I need is the list of parts that are supposed to come with the alarm. I only have the brain module. I am trying to peice the system together, its sure taking time...
Another part I can think of was the tilt sensor. I took one apart years ago and it was kind of neat for it's time. The sensor had a weight assembly that hung down off of a pivot point (looked like a miniture baby cradle). When the system was armed an internal solenoid retracted in the tilt sensor and made a clunking sound and let the cradle swing down to close to level and then the solenoid would retract again allowing the cradle to become even more level and then de-energize and lock the cradle and sensor in a level position. If the car was moved more than 10 or 15 degree's from that level it would trip the system. I remember testing one back then and just before the tire came off the ground using a bumper jack the sensor tripped the system.
Another thing I recall was the starter interup relay. It was a small steel box (maybe 1.5" square on top and about 3" tall) with 2 10-12 gauge wires that went to the starter solenoid, the orange wire that went to the brain and a short black ground wire with a ring terminal on it. The neat thing about it was there was a rubber cover on the one end that had a rocker switch underneath to defeat the interupt should the system malfunction.
They also had neat pin switches back then (I used some on my 73 Nova a few years ago when I redid the car).
Boy, thinking about that system reminds me of how far this stuff has come.
Jim/Saint Louis
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1968 Chevy II Nova Garage Find 2012
1973 Nova Custom
1974 Spirit of America Nova
1973 Nova Pro-Street