Just finished fitting the cruise control system, Heres a little list of whats needed,
Column Switches for lights and warning hazard. (With controls for CC)
Servo Pump & Mounting bracket.
Throttle linkage & vacuum diaphragm.
Switches/Sensors for brake and clutch pedals. (with metal clips)
Loom, wiring & vacuum.
Cruise Control ECU.
Everything is a part of the one loom comprised of one vacuum hose and one electrical loom. The loom connects to everything as follows,
Under the bonnet you have the vacuum diaphragm and linkage mounted onto the intake manifold, the linkage arm then connects onto the throttle body. On my 7A the bracket sits on the top of the manifold at the back of the engine and has a long rod that connects onto the throttle body. On our S4(AAN) the unit sits just under the throttle body and the rod points up and connects onto it. Not sure of its position on 3B/ABY motors. Note the mounting bracket and rod length differ for each engine, the rest of the CC system is the same for each engine type.
Also under the bonnet you have to mount the Vacuum pump. Coming out of the pump the vacuum line has a T piece, one end connects to the vacuum diaphragm and the other goes through the firewall on the passenger side behind the glove box. Wiring loom also connects to the servo pump and has to be routed through the firewall also.
Next the wiring loom connects to the ECU unit under the dash. It is actually mounted on the back of the dashboard above the glove box. I.e. open the glove box and put your hand up and feel the back of the wood trim, its just there. The rest of the wiring loom then has to travel across to above the drivers feet with the vacuum loom.
On the pedals you have two sensors, they are a vacuum release valve and an electrical switch to turn the CC off should you press the clutch or brake pedal. So both the wiring loom and vacuum loom plug into each one. The two holes for the sensors are there however you also need two round metal spring clips to mount them. They are the same mounting as the brake light switch by pushing into the metal spring clips. Just make sure you get these clips too when you source the parts or you will have no way to mount the sensors.
Final part is a small blue plug with 4 wires on it which plugs into the cars wiring loom just beside the diagnostic connectors. The blue plug is on the car already so it’s easy to find.
That’s it, plug and play
I was surprised how well the system works, i covered a good 40miles last night at 80mph and it sat perfectly at that speed for the entire journey. Its a strange sensation having the car hold 80mph uphill on 2/3rds throttle when your not driving 
What i did find interesting was 40mph in a built up area, seems really really fast when your not in control 
Note if you are buying parts from a LHD drive car to fit into a RHD you need to modify the servo pump bracket and lengthen the wiring loom & vacuum hose.
Mark.
P.S. Will take a few pics later..
Column Switches for lights and warning hazard. (With controls for CC)
Servo Pump & Mounting bracket.
Throttle linkage & vacuum diaphragm.
Switches/Sensors for brake and clutch pedals. (with metal clips)
Loom, wiring & vacuum.
Cruise Control ECU.
Everything is a part of the one loom comprised of one vacuum hose and one electrical loom. The loom connects to everything as follows,
Under the bonnet you have the vacuum diaphragm and linkage mounted onto the intake manifold, the linkage arm then connects onto the throttle body. On my 7A the bracket sits on the top of the manifold at the back of the engine and has a long rod that connects onto the throttle body. On our S4(AAN) the unit sits just under the throttle body and the rod points up and connects onto it. Not sure of its position on 3B/ABY motors. Note the mounting bracket and rod length differ for each engine, the rest of the CC system is the same for each engine type.
Also under the bonnet you have to mount the Vacuum pump. Coming out of the pump the vacuum line has a T piece, one end connects to the vacuum diaphragm and the other goes through the firewall on the passenger side behind the glove box. Wiring loom also connects to the servo pump and has to be routed through the firewall also.
Next the wiring loom connects to the ECU unit under the dash. It is actually mounted on the back of the dashboard above the glove box. I.e. open the glove box and put your hand up and feel the back of the wood trim, its just there. The rest of the wiring loom then has to travel across to above the drivers feet with the vacuum loom.
On the pedals you have two sensors, they are a vacuum release valve and an electrical switch to turn the CC off should you press the clutch or brake pedal. So both the wiring loom and vacuum loom plug into each one. The two holes for the sensors are there however you also need two round metal spring clips to mount them. They are the same mounting as the brake light switch by pushing into the metal spring clips. Just make sure you get these clips too when you source the parts or you will have no way to mount the sensors.
Final part is a small blue plug with 4 wires on it which plugs into the cars wiring loom just beside the diagnostic connectors. The blue plug is on the car already so it’s easy to find.
That’s it, plug and play
I was surprised how well the system works, i covered a good 40miles last night at 80mph and it sat perfectly at that speed for the entire journey. Its a strange sensation having the car hold 80mph uphill on 2/3rds throttle when your not driving What i did find interesting was 40mph in a built up area, seems really really fast when your not in control Note if you are buying parts from a LHD drive car to fit into a RHD you need to modify the servo pump bracket and lengthen the wiring loom & vacuum hose.
Mark.
P.S. Will take a few pics later..
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