Wiring Diagram

12volts constant = black

starter = black / yellow

ignition 1 = white /blue

ignition 2 =

ignition 3 =

accessory 1 = white

accessory 2 = green

park lights = WHITE/ red  - driver kick

door pin  = white / red  - left of steering column

door lock  =WHITE/ black  - left of steering column

door unlock = red / green -   "          "               "

factory disarm =

horn =yellow /white    -   steering column

tach = @ any injector

Thanks, This is a tremendous help.   If you have a block diagram

I would be happy to buy one.  Thanks Again

1988 Mercedes 420 SEL

|       ITEM      |     WIRE COLOR     |POL|       WIRE LOCATION        |
|              12V|red *1              |+  |ignition switch             |
|          STARTER|purple *2           |+  |ignition switch             |
|         IGNITION|pink/black          |+  |fusebox                     |
|  SECOND IGNITION|pink/green (2nd acc)|+  |ignition switch             |
|        ACCESSORY|pink / YELLOW         |+  |fusebox                     |
|       POWER LOCK|blue, green (L,R)   |E  |either kick or pump in trunk|
|     POWER UNLOCK|same wire           |   |                            |
| PARKING LIGHTS +|gry/wht and gry     |   |switch or anti-theft *5     |
|       HEADLIGHTS|WHITE/ yellow        |+  |light switch                |
|     DOOR TRIGGER|brn/gry, brn/wht/blk|-  |anti theft *3               |
|  TRUNK/HATCH PIN|BROWN / WHITE/ red     |-  |anti-theft unit *5          |
|         HOOD PIN|BROWN / WHITE/ gray    |-  |anti-theft unit *5          |
|  FCTRY ALARM ARM|yellow/blue         |-  |anti-theft unit *5          |
|FCTRY ALRM DISARM|GREEN/ YELLOW        |-  |anti-theft unit *5          |
|       TACHOMETER|black               |   |ignition coil               |
|       BRAKE WIRE|BLACK/ red           |+  |brake sw or anti-theft *5   |
|     HORN TRIGGER|blk/pnk, blk/RED / pnk|+  |st column, anti-theft *5    |
|           WIPERS|black and blue *4   |+  |wiper switch                |
|  LF WINDOW UP/DN|green - black       |B  |at switch in console        |
|  RF WINDOW UP/DN|green - black       |B  |at switch in console        |
|  LR WINDOW UP/DN|grn/red - blu/wht   |B  |at switch in console        |
|  RR WINDOW UP/DN|grn/red - blu/wht   |B  |at switch in console        |

Notes:
*1 Also BLACK/ red at the factory alarm. Do not use this feed wire for remote start.  *2 Also purple or PURPLE / white at the center console. Do not use the PURPLE / white for remote start, use the purple at the center console or switch only.  *3 Can also be found at the passenger front pin (BROWN / gray) and either rear pin or dash mounted rear dome light switch (BROWN / WHITE/ black at pin and BROWN / white at dash switch). Also the rear doors changed to BROWN / white at all locations in later production.  *4 Use both of these wires and diode isolate to get all speeds.  *5 The anti-theft module is located just below the passenger foot board.