The power lock motors are draining high current for a short period of time when the battery is connected,
the absorbed current should be drop to a few milliampers as soon the lock motors become rest/calm.
If no other faults are present, the central locking won't drain the battery. The spark at the battery terminal is
normal when connecting.
If the speedo is shows 120 MPH when the car is standing still, that could be:
- failure in closed loop control of the speedo drive motor (defective comparator IC on the speedo board
or the speed signal of the speedo drive motor is not reaching the comparator IC)
- the signal from the speed sensor (inductive pickup in the gearbox) is noisy due cable screening failure.
- the transistor at the speedo drive motor speed control is defective (died in shorted/low resistance state)
If the heater is in air recirculation mode, then the heater fan will run at the lowest speed, regardless of the
fan control knob OFF state.
No cranking can caused by the failure of the ignition switch. I had to replace mine some years ago,
because the high current closing contatcts became defective. The ignition was OK, but nothing happened
when turned the key further. For temporary fix i've pulled a wire from the starter solenoid coil to the passenger
compartment and i've operated the starter solenoid by putting the other end of this wire to the cigar lighter.
Last edited by LoneWolf33; 23-10-11 at 19:34.
Reason: OFF was missing