compustar alarm 900fm

hi guys, i did a search but couldnt find anything, im looking for basic wiring info on the compustar alarm, i have an alarm installed now but i would like to switch to this one i have.

im just looking for basic power, ground, remote power...

the wires are printed on the back of the manual.

if you just want power/ground

look at the large 6pin harness

BLACK - ground
RED - Constant 12v
RED / WHITE - Constant 12v

do oyu know what brain model you are installing?

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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert

hi, its the RF-2W900 alarm, i want to replace my old alarm with this one but having trouble with the wiring

i meant to say the wiring is on the back of the brain itself.

so everything you need to know is there. if you need an install manual you can get it in downloads.

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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert

ok, my first large harness only has 4 wires? the brain says RED / power   BLACK/ ground i have those hooked up along with the siren to the brown

im just trying to get basic arm and disarm but cant get any sound from siren and the led wont even come on... are there any other wires i must hook up to get power?

is the siren ground attached?
how are you testing the unit?
if you are using the remote, is the antenna plugged in?
are you testing it in the vehicle or on a bench?
is there a fuse in the power wire and is it good?

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This information is provided only as a reference.
All circuits should be verified with a digital multi-meter prior to making any connections.

91stt] wrote:

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is the siren ground attached?
how are you testing the unit?
if you are using the remote, is the antenna plugged in?
are you testing it in the vehicle or on a bench?
is there a fuse in the power wire and is it good?

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im testing it in my car, the alarm i just took out worked fine but very old and limited options

yes the siren is grounded, i am using the remote, the antenna and the led are plugged in, there is a 30 amp fuse in the line and its fine

is there certain buttons too press on the remote for first use?

should the led come on?

Well if you didn't notice the remotes do not come preprogrammed.

Program your remotes. And you should be fine. Also if you tell us what your working with this will HELP alot.

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"dont ground out!"

the 900fm is the one with the blue or grey remotes i assume.

cycle the ignition 5 times, wait for a click, press lock, wait to hear 2 clicks then turn off ign.

you can simulate this by tapping the ign wire to constant 12v.

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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert

its a 1984 Z28 Camaro

yes it comes with one blue pager remote and one grey keyless remote

thanks, i will try tomorrow to cycle the ignition and see what happens.

tedmond wrote:

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the 900fm is the one with the blue or grey remotes i assume.

cycle the ignition 5 times, wait for a click, press lock, wait to hear 2 clicks then turn off ign.

you can simulate this by tapping the ign wire to constant 12v.

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thats where im confused, what wire is the ignition wire? my harness has 4 wires and none of them are labeled ignition power...

ok, got almost everything figured out, problem was the cycling the ignition 5 times...

my old alarm used a positive wire for the lock and unlock, this alarm uses negative wire for it, how do i make this work? Thanks

ok thanks to tedmond here at the forum i got this working

just a little confused at the fact that this alarm only has negative door wires?

i had to buy 2 relay and change the negative wires from the alarm to over to positive for my doors which was a pain in the ass and alot more wires, the alarm i installed in my car back in 1998 even had positive and negative wires for the door but everything seems to be working fine now, Thanks guys.

next time use a DM-600.

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"dont ground out!"

the door lock outputs unfortunatly are not flip flip polarity and only negative,

but if youre talking about door TRIGGER inputs, then the compustar works both on neg OR positive (jumper setting)

oh dswift, you and the compustar relay pack lol, since im no dealer its more cost effective if i just use 2 relays and the harnesses

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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert

Ted Mr, Swift has a point, when you're a pro looking at speed and efficiency, and you charge for these accessories, case in point, 528t costs me $9, I can buy an equivalent Velleman kit for $7.5 then spend an hour building it. What does that hour cost me?

Update on do you buy or make it yourself.....DEI do a mini relay 8616 which is great for mirror closing polarity switching etc.
For the price of one, £3.90 = $6, I can buy 10 from RS Components (Farnell in the US), with enough change to add shrink sleeving and diodes (which they don't).

i just use standard bosche relays and harnesses. 5bucks for the set but the relay pack is much more compact

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Ted
2nd Year Tier 1 Medical School
Still installing as a hobby...pays for groceries
Compustar Expert