Originally Posted by OAP Pete

Just a few pointers hear.....im sure you have the motor with 2 wiring plugs on....the one with 3 wires your see one wire is "Brown" ..thats earth..your see the terminal has a short bracket on it to Bolt on the caseing....make sure buy testing that Brown wire is Earth [ neg - ] ....the other plug is 2 pin...bullet connector... the motor under the brown cover on motor..2 screw fixing as i remember...you will see 2 slip rings...with contacts running on them...these are the Parking controls..and the armature "locking" when the motor is switched off...ie wipers return to lower screen..any problem with this WILL cause your problem.. one other thing to check...with the ignition on...wiper switch must be off...one of the 5 wires will be live + pos...im sure it will be, as im sure it was on the same Fuse...but check.. from ex Auto Sparks ...now 80 retired ...hope of help. Peter