Vehicles with serial number 2000 were smaller with two contactors,
Vehicles between 2000 and 3006 with 4 contactors executed.
The contactors are to be seen here at the left upper contour at the engine compartment wall.
Errors occurred, if the protective contacts became hot. The plastic cap became " rotten " cracked, and the contactor fell apart mechanically -
At work on these contactors one must watch out much and absolutely operate with two wrenches, so that no torque come on the contactor.
After serial number 3006 a double contactor combination was used. One contactor for forward and backwards. Each contactor has two normally open contacts available.
Errors occur, if the protective contacts become hot. The contacts then do not close.
Causes for the heating up of the protective contacts can be:
The typical error is that el only drives backwards, since the forward contactor hangs. If you're not at the shop, try this trick -
By exchange of the links at the motoris reversed, thus drives one with the still functioning contactor.
I executed this repair on a friend's vehicle 8 minutes before a City-El rally (route de Ruhr) - he started on time, and so did I.
An exchange of the contactor is not necessarily needed here. As a dealer I would insert in any case new contactor to the customer, when working on your own vehicle there is a fix that is labor intensive, but cheap - the contactor can be repaired sometimes.
The following work is necessary for it.
As a dealer, the danger exists that the contactor hangs times again and the customer expresses then appropriate displeasure. Unfortunately the contactor combination is supplied only as complete part (Clarification: you can only buy both contactors together as one assembly - RRY). The contactors are also not identical (mounting holes), so that one must somewhat cheat in order to insert a reverse contactor as a forward contactor.
It is advisable on all vehicles after 3006 to drill the holes in the black plastic cover over the contactor to increase the heat dissipation (before drilling remove the cover) to diminish or remove the cover completely.