Checking stalk unit operation

Check 5550AA

Check the continuity between the contacts for the connectors on the steering column switch unit in the different positions:

Side lights control check

• with the control on symbol 0, check the state of the contact at connector B between pins 5 and 6: open circuit
• with the control on 'side lights', check the state of the contact at connector B between pins 5 and 6: open circuit

Dipped headlamps control check

• with the control on 'side lights', check the state of the contact between pin 3 (connector B) and pin 5 (connector C): open circuit
• with the control on 'dipped headlamps' check the state of the contact between pin 3 (connector B) and pin 5 (connector C): closed circuit

Main beam headlamps control check

• with the control in the rest position, check the state of the contact between pin 2 (connector B) and pin 5 (connector C): open circuit
• with the control on 'main beam headlamps', check the state of the contact between pin 2 (connector B) and pin 5 (connector C): closed circuit

Flasher control check

• with the flasher lever released, check the state of the contact between pin 2 (connector B) and pin 5 (connector C): open circuit
• with the flasher lever operated, check the state of the contact between pin 2 (connector B) and pin 5 (connector C): closed circuit

'AUTO lights control check

• with the control in position '0', check the state of the contact between pin 4 (connector B) and pin 5 (connector C): open circuit
• with the control in the 'AUTO position, check the state of the contact between pin 4 (connector B) and pin 5 (connector C): closed circuit

Direction indicators control check

• with the control lever in the 'centre' position, check the state of the contact between pins 5 (connector C) and 6 (connector C): open circuit and between pins 1 (connector B) and 5 (connector C): open circuit
• with the control lever in the 'left' downwards position check the state of the contact between pins 5 (connector C) and 6 (connector C): closed circuit with the control lever in the 'right' upwards position check the state of the contact betweeen pins 1 (connector B) and 5 (connector C): closed circuit.