F) Test Box For Control Unit - Operating Motor

F) TEST BOX FOR CONTROL UNIT - OPERATING MOTOR

The function of the operating motor or that of the motor activated solenoid valves A, C, D and E can be checked with a simple, locally made test box, regardless of the instantaneous temperature conditions. It is also possible to run the operating motor to any position with this test box, so that the above mentioned tests will be considerably easier to perform.

The test box is connected on the car's electric system with the positive and negative leads. Pull off plug (S2) on the control unit and connect the test box plug.

Switch on the test box - the LED must light up. If not, the positive and negative leads have been mixed up. The operating motor must run depending on the potentiometer position. The operating motor can be set to any desired position.

The test box output leads can be connected on the car as follows, if a multiple-pin plug is not available.

Test box lead term. 3 - on car ground
term. 4 - on plug 4 term. 4 |
term. 11 - on plug 5 term. 3 |- disconnect plug
term. 12 - on plug 5 term. 3 |

Wiring Diagram:

Required Parts
1 - Box housing approx. 60 x 40 x 20 mm
2 - Potentiometer 2 k-ohms/2 watts
3 - Resistor 3 k-ohms/2 watts
4 - Switch 911.613.321.01
5 - LED 5 mm red with holder
6 - Resistor 360 ohms
7 - Diode 1 N 4001 or 1 N 4004 or similar
8 - 12-pin multiple plug (AMP 583371-1 or plug from wire harness 928.612.921.00)