Can't find the line that goes to the vacuum resevoir, hence can't find the vacuum resevoir to check for vacuum...I understand the vacuum resevoir is in a different place in the coupes...any suggestions please??? I don't see the line going through the fire wire...supposed to be black yes?

Thanks

I believe the reservior line is brown. Usually there is a check valve with a three way connector which has a yellow line that goes to the door locks and a brown line that goes to the reservior. It isn't under the rear window deck in the trunk.

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Thanks. Vacuum reservoir is underneath the rear window in the trunk. LIne to it is yellow with grey stripe...slow leak...now what to do.

thanks everybody for your help...very productive weekend on the car. Whole vacuum education.

I've read the connection to the reservoir is the most likely spot for a leak.
At the very bottom right of the pic, it says to use non-hardening silicone on the inside of the grommet, and outside of the hard vac line, being careful not to clog.

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83 SD

84 CD