door locks, 1996 dodge ram

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b1mmuo27

Member - Posts: 37

Joined: January 25, 2005

Location: Canada

Posted: March 17, 2010 at 7:11 PM / IP Logged

I don't know if I'm goofy but I can't remember how to do this. I set up my Sprinter 4 years ago this way. Now I have a 1996 Dodge Ram pickup. It was broken in 2 weeks ago so I decided to install an alarm. That went ok but I am trying to tie the power door locks to the alarm. There is no remote for the truck so I am trying to wire it to the alarm. I have 2 relays. One for lock the other for unlock. I am using the pulse from the alarm to lock & unlock. Not working. I tie the pulse from the alarm to the coil on each relay & run 12V through the normally open contacts. The 12v through that contact pulses to the door lock/unlock. Not working. What did I miss?

tedmond

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Joined: January 06, 2007

Location: Ontario, Canada

Posted: March 17, 2010 at 8:08 PM / IP Logged

you need 2 relays and 2 resistors

820 ohm - lock

330 ohm - unlock

set up relay like so, just make one as lock or unlock

85 - negative output from alarm

86 - constant 12v

87 - chassis ground

30 - lock or unlock wire with proper resistor inline.

Ted

2nd Year Tier 1 Medical School

Still installing as a hobby...pays for groceries

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b1mmuo27

Member - Posts: 37

Joined: January 25, 2005

Location: Canada

Posted: March 17, 2010 at 8:26 PM / IP Logged

Thanks I'll try that tomorrow. I am an electrician for 28 years & we thought that the relays were as follows:

85 coil

86 coil

30 common

87a normally open

87 normally closed

tedmond

Gold - Posts: 4,610

Joined: January 06, 2007

Location: Ontario, Canada

Posted: March 17, 2010 at 10:03 PM / IP Logged

you just have 87 and 87a mixed up. here you go.

https://www.the12volt.com/relays/relays.asp

Ted

2nd Year Tier 1 Medical School

Still installing as a hobby...pays for groceries

Compustar Expert

b1mmuo27

Member - Posts: 37

Joined: January 25, 2005

Location: Canada

Posted: March 17, 2010 at 11:15 PM / IP Logged

Yes I see I did a boo boo. Why the difference in resistance on the lock & unlock lines? Thanks

blanx218

Silver - Posts: 654

Joined: September 23, 2008

Location: Pennsylvania, United States

Posted: March 17, 2010 at 11:43 PM / IP Logged

dont wanna cause any confusion but a 96 ram has 5wire locks in any info i have. that would mean wire youre relays as follows:

cut each of the lock - ORANGE / purple unlock - pink/purple

pins 85 & 87 - +12 volts

pin 86 - lock or unlock (-) output from the alarm

pin 87a - switch side of the lock/unlock wire

pin 30 - motor side of the lock/unlock wire

tedmond

Gold - Posts: 4,610

Joined: January 06, 2007

Location: Ontario, Canada

Posted: March 18, 2010 at 6:20 AM / IP Logged

blanx could be right as well.

but since its a canadian model truck, i have done one and it was multiplexed (using resistors)

to the OP, the differance in resistance controls the voltage read by the computer. the one wire systems aka multiplex.

Ted

2nd Year Tier 1 Medical School

Still installing as a hobby...pays for groceries

Compustar Expert

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: March 18, 2010 at 7:18 AM / IP Logged

Just to add to the general level of ignorance, I was doing a lot of Cherokees up to 95 and they had a pos. trigger, the relays were in the under dash relay module, at least that's where they were in the right hand drive version built by Steyr in Austria Doh door locks, 1996 dodge ram -- posted image.

door locks, 1996 dodge ram -- posted image.

b1mmuo27

Member - Posts: 37

Joined: January 25, 2005

Location: Canada

Posted: March 18, 2010 at 10:11 AM / IP Logged

I hear what you say about multiplex. My Sprinter had a CANBUS system in it. This old '96 is straight analog. The only computer in it is the antilock brakes & TPS switch. It's a diesel so it's pretty simple.

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: March 18, 2010 at 10:53 AM / IP Logged

Don't confuse multiplex with the CAN they are completely different beasts!

Actually the Sprinter only went CAN from about 07. I did an 06 last week with no references to any strange electrics

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