2001 pontiac grand am locks with 451m

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Jimmy 2 Times

Copper - Posts: 67

Joined: January 25, 2005

Location: United States

Posted: December 19, 2011 at 12:31 PM / IP Logged

i just did rs on a 2001 grand am. everything is working fine except for the door lock/unlock

i used a 451m with the 1500ohm resitor, and it doesnt lock or unlock

my 451 m is wired up like this

purple to ground

WHITE/ black cut off

BROWN / black cut off

blue and green to the white wire in the car (with the resitor)

I verified the correct resistance, but no unlock

I have read others used different resitors, how would i determine if in need another value?

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kreg357

Platinum - Posts: 7,783

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Joined: January 30, 2009

Location: Pennsylvania, United States

Posted: December 19, 2011 at 1:20 PM / IP Logged

Verify you have the correct White wire in the Black plug in the Driver Kick Panel. After verification, a quick test is to just apply a straight chassis ground with a jumper to this White wire. The doors should lock. Do the same with the jumper and a 1.5K ohm resistor on the end of it. The doors should unlock.

Your wiring on the DEI 451M outputs looks OK. Can you hear / feel the 451M relays click. Check the 15A fuse and chassis ground to the Purple wire and that the Red wire in the 3 Pin white plug is getting +12V.

Soldering is fun!

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Jimmy 2 Times

Copper - Posts: 67

Joined: January 25, 2005

Location: United States

Posted: December 19, 2011 at 2:06 PM / IP Logged

yes, i tested the wire to ground and it locked, just not unlock.

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offroadzj

Gold - Posts: 2,043

Joined: June 03, 2005

Location: New York, United States

Posted: December 19, 2011 at 2:50 PM / IP Logged

I have had numerous cars where the resistance was incorrectly listed. I would either try a few different resistances and see if you find one that works; or test for the correct resistance on the wire while unlocking.

Kenny

Owner / Technician

KKD Garage LLC

Albany, NY 12205

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kreg357

Platinum - Posts: 7,783

Joined: January 30, 2009

Location: Pennsylvania, United States

Posted: December 19, 2011 at 2:54 PM / IP Logged

For a very comprehensive guide on door lock systems, go to the Downloads section and search on DF1041. Page 10 has the info for your Type H (-) Door Locks. They detail how to determine the correct resistor value required.

Soldering is fun!

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howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: December 19, 2011 at 4:02 PM / IP Logged

Has the poster made sure the resistor is only on the blue wire, I read the first post as wires joined, then the resistor.????

This morning my pants belt broke, I spilled my tea all over my desk and 2 trips to my local supermarket to get one working wireless mouse, oh and lost out on $600 worth of profit!*

So no stupids please this week.

*People getting big ideas then realising they can't afford it.

Do you know 5102 and 5202 DEI products, one way and two way are $75 apart TRADE here?

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2001 pontiac grand am locks with 451m

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