Looking through some Audi B4 pdf's, it states (for LHD):
Quote:
Removing and installing combi relay
Location:
Front left, beneath instrument panel in auxiliary relay plate
=> Current Flow Diagrams, Electrical Fault Finding; Fitting Locations
Note:
Switch off ignition for removal and installation. Not applicable as of model year 1993.
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So you don't have one to check. It also says about the ABS ECU:
Quote:
Prior to removal on vehicles as of model year 1993 interrogate fault memory with fault reader -V.A.G 1551-.
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I put the pdf here if you want to have a read up:
http://www.brita.plus.com/80q/FWD_Running_gear.pdf right click the link to download