viper alarm, interesting failures

I am installing a 5900 into a 1979 chevy truck. I have the alarm brain wired in and it is not functioning properly. I have power ground and door trigger verified by meter. Door pin operates properly but no full trigger is made by grounding door pin.   Alarm has no audible chirps when arming or disarming however the parking lights flash. There is no trigger from either the 508 or the 504. Alarm will not warn away for full alarm. Sirens work when panic mode is triggered from remote. Remote will not show any two way indications except arm and disarm lock.

I have switched out the brain for a 560xv spare I had laying around and got the same results. I have switched out the sshock sensor for a new one on both brains and with both brains I had the same result. I was going to try reprogramming the rr
Remote butni cant tell if I am in programming kde as I dont get any beeps from siren. I thought I was in valet mode but I tried to take it out of valet mode and still have the same problems.

So I have run out of ideas and now am open to any that you guys might have.

Show us a list of the alarm wires and where you've wired them into the vehicle, also model of truck.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

that really sounds like a ground issue, if you are right and you verified the ground then maybe its a bad internal ground.

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howie ll wrote:

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Show us a list of the alarm wires and where you've wired them into the vehicle, also model of truck.

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1979 chevy c10. base model pickup.  i am not sure trim level. 

Wires.

ALARM           TRUCK

H1

red     batt terminal on fuse block.

black ground bus above e brake

green   white door pin wire

brown   siren positive

white brown parking light wire at light switch

soundnsecurity wrote:

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that really sounds like a ground issue, if you are right and you verified the ground then maybe its a bad internal ground.

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That was my first guess as well.  i have it grounded to a ground bus that i am running my gauges, WB, and a lot of other eletronics on as well. 

I have run large cable from the alternator case to the frame and the frame to the body in a couple of places.  i also grounded the battery to the frame as well.  this truck has 0.0 ohms from anywhere on the truck to the negative battery terminal. 

i swapped brains for another viper brain to see if the problem followed and it did not......which makes me think that it is my connections but i cant seem to find anything wrong with the few wires i have connected.

forgot to add that i can flick the shock sensor with my finger and wave my hand in front of the 508d and they will both light up with a red light but not warn away or even full trigger.  which is wierd.

is it in valet mode? because you "tried" to take it out of...what happens?

Ween] wrote:

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is it in valet mode? because you "tried" to take it out of...what happens?

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I have tried the lock unlock lock technique with the door open numerous times but have had no success. I am now installing the relay satellite so I can try to disarm using the vlaet program switch method but I need ignition voltage through the relay satellite to the yellow wire in the ribbon harness first.
But to answer your question it is not in valet mode.

mtrhd329 wrote:

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soundnsecurity wrote:

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that really sounds like a ground issue, if you are right and you verified the ground then maybe its a bad internal ground.

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That was my first guess as well.  i have it grounded to a ground bus that i am running my gauges, WB, and a lot of other eletronics on as well. 

I have run large cable from the alternator case to the frame and the frame to the body in a couple of places.  i also grounded the battery to the frame as well.  this truck has 0.0 ohms from anywhere on the truck to the negative battery terminal. 

i swapped brains for another viper brain to see if the problem followed and it did not......which makes me think that it is my connections but i cant seem to find anything wrong with the few wires i have connected.

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if the problem is fixed by swapping the brains then the problem is within the brain of the alarm.

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soundnsecurity wrote:

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mtrhd329 wrote:

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soundnsecurity wrote:

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that really sounds like a ground issue, if you are right and you verified the ground then maybe its a bad internal ground.

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That was my first guess as well.� i have it grounded to a ground bus that i am running my gauges, WB, and a lot of other eletronics on as well.�

I have run large cable from the alternator case to the frame and the frame to the body in a couple of places.� i also grounded the battery to the frame as well.� this truck has 0.0 ohms�from anywhere on the truck to the negative battery terminal.�

i swapped brains for another viper brain to see if the problem followed and it did not......which makes me think that it is my connections but i cant seem to find anything wrong with the few wires i have connected.

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if the problem is fixed by swapping the brains then the problem is within the brain of the alarm.

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Im sorry I didnt explain that part right I swapped brains and have the same problems. No matter what I do.

ok so i connected the satellite relay and was able to put it into valet mode by turning on and off the ignition and pressing the valet button.  i then took it out of valet mode with the transmitter.  both before and after i have no chirps from the siren.

Check the viper harness for a poor positive or ground at the connector. You may have a bad harness if 2 brains are having the same issue.

yea i vote for a bad harness too. either something wrong with the plug or the pins inside the plug are messed up in a way that is causing a bad connection. maybe try unhooking one wire at a time and testing the system to see if anything changes.

the reason i think it is still a ground issue is because all of the sensors and your doorpin are all negative trigger. so something is putting up enough resistance to the alarm so that it is not seeing these sensor inputs being triggered. perhaps a broken wire inside the insulation so you wouldnt be able to tell and it would still meter 0 ohms but not have enough wire left inside to pass any current without resistance.

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So I found the issue. I had 3 of the viper sirens on the brown wire. I have run this setup on this brain for a good many years without issues. So I couldnt understand what would make it not chirp but sound on full alarm. So I took the brown wire and hooked up a multimeter on diode check. Hit the arm hutton and it chirped the meter. I now have only one interior piezo and the factory soft touch siren on the brown wire and all is restored. I now have shock sensor trip and warn away. Also my two way functions restored themselves.   Wierd.

all those sirens draw too much current through the brain. you can still have the sirens if you wire them through a relay, just make sure you test each siren to make sure its not blown.

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You could still have them, just relay them.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Ya I have a drawer full of them I am going to install. Just need to f ind all the little hidden places I need to mount them.

And of course a relay is needed to run all of my sirens.