Hi all,
Been about 2 months since I got my rangie, been fixing little things here and there (tightened up the steering box, replaced some bulbs in the switches, had to disassemble some of the switches as they were not functioning/corroded, fixed gunked up air inlet valve, fixed seat switches, replaced fog lights, got the eas system all repaired and rebuilt so that works now...most of the time)
Anyway back to the current issue, cruise control. i swore to myself I should be able to fix this thing but I am out of ideas.
Firstly I took the cruise main switch apart and cleaned it all up b/c it wasn't turning on. So now the cruise master switch turns it all on good right? nope still wont 'set'.
Then I tested the vacuum diaphragm, holds vacuum just fine (no leaks)
Next I got my hands on a replacement cruise computer from a 93 range rover and tried that...nope
Then I got a replacement vacuum pump...nope (actually bench tested my current one, works fine)
Then I took the vacuum release valve/switch off and checked it, switch was good, valve was good
Lastly I applied vacuum to the lines from the vacuum pump and watched the diaphragm valve compress like it should and hold, so no leaks at all in the system.
At this point all the components check out so I was at a loss. I stumbled upon the 15pin cruise computer pin-out so I decided to check all of these
The set and res switches were fine
the comp was getting power
then i went to measure the 12V for the brake switch WITHOUT the peddle pressed....I got 0V...hmm. So I pressed the pedal and saw 12V so THIS IS BACKWARDS? its supposed to supply 12V to the system then drop to 0 when the pedal is pressed but its the opposite??!???!
So if anyone can shed some light on this I would be forever indebted to you :-D
Shane
Been about 2 months since I got my rangie, been fixing little things here and there (tightened up the steering box, replaced some bulbs in the switches, had to disassemble some of the switches as they were not functioning/corroded, fixed gunked up air inlet valve, fixed seat switches, replaced fog lights, got the eas system all repaired and rebuilt so that works now...most of the time)
Anyway back to the current issue, cruise control. i swore to myself I should be able to fix this thing but I am out of ideas.
Firstly I took the cruise main switch apart and cleaned it all up b/c it wasn't turning on. So now the cruise master switch turns it all on good right? nope still wont 'set'.
Then I tested the vacuum diaphragm, holds vacuum just fine (no leaks)
Next I got my hands on a replacement cruise computer from a 93 range rover and tried that...nope
Then I got a replacement vacuum pump...nope (actually bench tested my current one, works fine)
Then I took the vacuum release valve/switch off and checked it, switch was good, valve was good
Lastly I applied vacuum to the lines from the vacuum pump and watched the diaphragm valve compress like it should and hold, so no leaks at all in the system.
At this point all the components check out so I was at a loss. I stumbled upon the 15pin cruise computer pin-out so I decided to check all of these
The set and res switches were fine
the comp was getting power
then i went to measure the 12V for the brake switch WITHOUT the peddle pressed....I got 0V...hmm. So I pressed the pedal and saw 12V so THIS IS BACKWARDS? its supposed to supply 12V to the system then drop to 0 when the pedal is pressed but its the opposite??!???!
So if anyone can shed some light on this I would be forever indebted to you :-D
Shane