SERVICE BULLETIN NUMBER ST-25-10/81

CATEGORY:    TECHNICAL

ATTENTION:   ALL DMC DEALERS/SERVICE MANAGERS

SUBJECT:     HEATER/AIR CONDITIONING MODE SWITCH OPERATION

If the heater/air conditioning mode switch fails to operate,
first check that the vacuum check valve is fitted correctly.

The black and white plastic valve is fitted into the vacuum line
between the vacuum reservoir and engine and is to be found towards
the left front of the engine compartment.

When correctly fitted, the black side of the valve faces towards
the engine.



Please inform all personnel accordingly.



Lutz Feuerabendt
Technical Service Manager

LF:mc                                                     Issued 10/26/81