Keyless entry in 90 S4 - problem
10-18-2007, 10:44 PM
#31
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Oh. I did remove that little carpeted piece and I saw the bulb control module, then I buttoned it back up. I'll go back in there later. The location diagram makes it look a little more central. THANKS GUYS!
Last edited by Bill Ball; 02-26-2008 at 06:06 PM.
02-19-2010, 01:58 AM
#32
Drifting
Here's the way I prepped the factory wiring for a Keyless Entry on my 1990 S4. Factory wiring mods in three parts..
- To allow greater than 1/2 second locking pulses, I added two diodes (1N4001). The diodes can be mounted on a small strip of perf board, then covered in shrink wrap. The wiring carries into the second image, where the lower diode is wired to pin 2 of the alarm controller. Fortunately, the controllers are in the same location. This mod maintains factory windows-up-with-key feature.
- Then, for the trunk release I added a mini DPDT relay (2 amp rated).
The DPDT relay also temporarily provides the special ground (normally disabled with doors closed) for the tailgate unlocking drive. The keyless pulls the relay coil to ground, providing +12V to the tailgate unlatching drive from the Central Electronics Panel at Connector O11.
The DPDT eliminates the need for modifying the tailgate unlatching mechanism ground, while maintaining the factory safety feature of pull switches only work an open door. I used another 1N4001 diode across the relay coil.
- And finally, for a Interior-Lights-On-With-Disarm/Unlock feature, a single diode (1N4001) wired between the Seat Belt Relay (928.618.102.03) and the Additional Control Unit Alarm System (929.637.160.00). Both relay sockets are located under the stereo head unit in the center console.
So, for my aftermarket keyless Entry connection points:
KE receiver was mounted to underside of dash with velcro, directly under steering column. (Functions implemented – Lock&Arm, Unlock&Disarm, Flash Lights, & Trunk Release)
1. Trunk Release Mechanism (-) - To added DPDT relay coil
Central Electronics Panel:
(located in passenger foot well)
1. Left Turn Signal - Connector H25 (BK/GN)
2. Right Turn Signal – Connector J21 (BK/WT)
3. Added Trunk Release Relay Output - Tailgate Release Mechanism +12V – Connector O11 (YE)
Note: I also used two large diodes (6A) between the left and right turn signal connections and the KE unit's light flash output wire. These were also mounted on a small strip of perf board and covered in shrink wrap.
Additional Control Unit Alarm System (928.637.160.00):
(located in center console, below stereo head unit)
1. +12V Constant, CE panel fused @7.5A, Pin 4 (RE)
2. Chassis Ground (-), Pin 3 (BR)
3. Tailgate Unlocking Drive Ground (-), Pin 1 (BR/WT)
4. Lock (Armed), Pin 2 (BR/YE)
5. Unlock (Disarm), Pin 9 (BR/GN)
- To allow greater than 1/2 second locking pulses, I added two diodes (1N4001). The diodes can be mounted on a small strip of perf board, then covered in shrink wrap. The wiring carries into the second image, where the lower diode is wired to pin 2 of the alarm controller. Fortunately, the controllers are in the same location. This mod maintains factory windows-up-with-key feature.
- Then, for the trunk release I added a mini DPDT relay (2 amp rated).
The DPDT relay also temporarily provides the special ground (normally disabled with doors closed) for the tailgate unlocking drive. The keyless pulls the relay coil to ground, providing +12V to the tailgate unlatching drive from the Central Electronics Panel at Connector O11.
The DPDT eliminates the need for modifying the tailgate unlatching mechanism ground, while maintaining the factory safety feature of pull switches only work an open door. I used another 1N4001 diode across the relay coil.
- And finally, for a Interior-Lights-On-With-Disarm/Unlock feature, a single diode (1N4001) wired between the Seat Belt Relay (928.618.102.03) and the Additional Control Unit Alarm System (929.637.160.00). Both relay sockets are located under the stereo head unit in the center console.
So, for my aftermarket keyless Entry connection points:
KE receiver was mounted to underside of dash with velcro, directly under steering column. (Functions implemented – Lock&Arm, Unlock&Disarm, Flash Lights, & Trunk Release)
1. Trunk Release Mechanism (-) - To added DPDT relay coil
Central Electronics Panel:
(located in passenger foot well)
1. Left Turn Signal - Connector H25 (BK/GN)
2. Right Turn Signal – Connector J21 (BK/WT)
3. Added Trunk Release Relay Output - Tailgate Release Mechanism +12V – Connector O11 (YE)
Note: I also used two large diodes (6A) between the left and right turn signal connections and the KE unit's light flash output wire. These were also mounted on a small strip of perf board and covered in shrink wrap.
Additional Control Unit Alarm System (928.637.160.00):
(located in center console, below stereo head unit)
1. +12V Constant, CE panel fused @7.5A, Pin 4 (RE)
2. Chassis Ground (-), Pin 3 (BR)
3. Tailgate Unlocking Drive Ground (-), Pin 1 (BR/WT)
4. Lock (Armed), Pin 2 (BR/YE)
5. Unlock (Disarm), Pin 9 (BR/GN)
Last edited by borland; 02-28-2010 at 05:01 PM.
08-16-2010, 12:22 PM
#33
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borland: Resurrecting this. I need to study your wiring method for some application to my 89. My trunk release via remote does not work unless I hit the unlock button on the remote first.
08-16-2010, 05:08 PM
#34
Drifting
Bill,
Well, I never considered the 89' wiring, as this was a 90' thread. My installation was optimized for available wire locations under the center console. That may or may not be the same on 89'.
For the keyless remote that I used (Prestige, model APS-101), the trunk/hatch release requires the keyless remote/alarm to be in disarmed/unlocked mode. Yours may function the same. The two button APS remote needs the trunk button to be pressed at least 3 seconds, otherwise it functions as a car finder (flashing lights only).
Well, I never considered the 89' wiring, as this was a 90' thread. My installation was optimized for available wire locations under the center console. That may or may not be the same on 89'.
For the keyless remote that I used (Prestige, model APS-101), the trunk/hatch release requires the keyless remote/alarm to be in disarmed/unlocked mode. Yours may function the same. The two button APS remote needs the trunk button to be pressed at least 3 seconds, otherwise it functions as a car finder (flashing lights only).
