Relay arrived, plugged it in, no change. I did notice something different before I replaced the relay: the abs light is off and only the red brake light is on (maybe the abs bulb burned out?).
All fuses are good. Pedal is still firm. Brake fluid reservoir is overfull (probably from the discharged accumulator). Same symptoms as the bad accumulator issue but for these two: a) the pump does not run in the key on position, and b) when tested, the four pin plug reads 0. Which led me to believe relay...to start with. Isn't the relay though, apparently.
Thoughts?
Good afternoon
First check to make sure the the ABS light is off the pump is working. I would do the following:
De-pressurize the system. Key off. Engine off. Depress and release pedal at least 25 times. Pedal should be rock hard.
Next key on/ engine off. The pump should come on. ABS/BRAKES lights should go out before the motor stops running.
If the pump is NOT running do the following:
Remove, inspect, clean and re-install the pressure switch and the pump relay connector. Note there are three relays located on the passenger side of the engine fire wall.
1. A/C WOT. 2. ABS relay. 3. Pump Motor Relay. The ABS and Pump relays can not be switched for troubleshooting.
Try a Key on/engine off attempt for the pump to work. If unsuccessful turn key off.
Get socket extension(s) and or pipe long enough to reach the pump motor.
Key on/engine off. Tap the extension(s) and or pipe against the pump motor with a hammer. Suspect the pump motor if the system now pressurizes. Reason. If the pump motor starts from striking, the vibration indicate the motor is on it way out. Best to change with the TEVES unit is removed and accessible from the car. I would change the pressure switch for good measure as preventive maintenance due to the age of the TEVES units.
If the pump motor is working, the ABS light if off but the BRAKE light is on check the following:
- Servicing.
- Low brake reservior sensor or connector.
- Brake proportion sensor or connector. Jack and supporting of front end is required.
- Air in the brake system. Brake caliber and or pad issue.
See attachment for addition troubleshooting information.
https://www.google.com/url?sa=i&rct...J4m89exW0WSu5bUn7Zplg7hQ&ust=1496882874217609
Good Luck.