Cruise control problems
#2
#3
Check all the vacuum hoses for cracks. Don't forget to get under the dash and check the line going to the brake pedal switch. Spraying all the connections with something like liquid tape helps seal them and keep them from leaking.
Search the site for a test procedure on how to verify the cruise components are working. I believe Rover Chris has been through the testing and could help walk you through it.
Search the site for a test procedure on how to verify the cruise components are working. I believe Rover Chris has been through the testing and could help walk you through it.
#6
You never know... mine was a combination of problems. Rotary coupler/clockspring was bad (I knew because the horn didn't work and the SRS light was on) missing vacuum hoses, missing vacuum "T", bad dump valve on the vacuum pump, and bad cruise ECU. Some time ago I posted a step-by-step procedure on checking the cruise ECU on a Disco 1. If you do a search, you'll find it.
Eric
Eric
#7
As I said, the clockspring is possible. Any of the components in the system could have failed.
I finally got motivated enough to look at my cruise control to find why it quit working. When I bought the truck the cruise didn't work so the dealer looked at it and found the master switch was bad and the line coming off the diaphragm at the throttle body was cracked. He fixed that and it was intermittent. Then I replaced the vacuum pump which didn't change anything, still intermittent until it finally quit working again. Bought a used ECU from Roverlandparts and that fixed until about 3 weeks. Today I found the problem. The vacuum line going from the T to the diaphragm had cracked again. I cut off the split part and put it back on (because I was too lazy to go get a new hose) and I now have cruise control again.
I finally got motivated enough to look at my cruise control to find why it quit working. When I bought the truck the cruise didn't work so the dealer looked at it and found the master switch was bad and the line coming off the diaphragm at the throttle body was cracked. He fixed that and it was intermittent. Then I replaced the vacuum pump which didn't change anything, still intermittent until it finally quit working again. Bought a used ECU from Roverlandparts and that fixed until about 3 weeks. Today I found the problem. The vacuum line going from the T to the diaphragm had cracked again. I cut off the split part and put it back on (because I was too lazy to go get a new hose) and I now have cruise control again.