1993 XJ6 sedan 4.0L - no power to abs pump, pump runs when system is bypassed, 2 relays under dash I think are good...swaped yellow one with other Jag (89 XJS), tested white/black one in relay tester (relay buddy). Check both 30amp fuses (driver side b9 & c6) & console fuse (#8, 3 amp).
What do I check next?
Also cooling fans & interior blower not working...related?
Just purchased, Car was sitting for 5 years, not sure if was working prior to storage.

 

Hi Buddy,
Can help with the blower problem, my XJ40 is in getting second hand blower motors installed as it had the same problem. I suggest finding someone who still works on your XJ and get them to fix it for you. It's a very complicated system with lots of relays inside the blower unit that can bugger up. Usually the blowers fill up with water as the plug under the wind shield wiper panel gets filled up with rubbish which causes the blower motors to fill up with water. Take the wiper panel off and clean it out on a regular basis (very easy).
Another tip if you use second hand blower units to replace the old ones, make sure they test the new ones to make sure they work first, and also check the plugs on the cables coming from the units to make sure they match the ones that came off your car as the different year models of the XJ40 had different plugs. The repair cost me about $900.00 AU. Hope this helps, good luck

 

I jumped the pump relay accross 30 & 87 and the pump kicks on. what tells the relay to activate, I get 12v at 30, 85, 68 but not 87 when the ignition is on.Electrical Technical Guides.pdf

 

More test info:
When I jump the white(wu) & yellow(yp) wires on the pressure switch the pump runs. Electrical Technical Guides.pdf

I changed the pressure switch and the accumulator sphere...still no power.
Next i am going to clean the wheel sensors