I'm having difficulty getting my cruise control to work and have read numerous threads on several forums; not to mention technical briefs, etc...
I've confirmed the steering wheel, dash and brake switches are good. The pump is operational. Actuator is good and linkage is within specs. Hoses and T have been replaced. The neutral lockout relay and inline diode have not been tested, but the switch is operational in it's default setting. I cannot locate the CC disable relay anywhere in my truck. The manual I have shows it in a vehicle with steering on the right. In that case it's located on the drivers kick panel. I assumed mine would be also; however, I have an open slot where I believe it should be. There are two blue and a black wire going to the white base. Check out the picture if you know these D1's and tell me what you think. Would a YWB10032 relay go there? How does the CC disable relay work? Can you bypass it to test the ECU? The photo is from behind the LH footwell panel.

 

What manual are you using? Have you downloaded the RAVE manual yet? RAVE is the same manual the dealer service technicians use. According to RAVE, and if I am understanding it correctly, the NAS Discos do not use a cruise control disable relay

 

I think that is the fog light relay, in any case, the relay you are looking for is in the pack under the pass footwell. 1st on the right. I am trying to run down the same problem as well.... everything is good to the test. I am thinking that I am loosing signal from the vss to the CC ECU

 

did you ever figure out what was going wrong with your cruise control? Similar story with my 1999 D1.

 

Do you have LEDs in your brakes lights?