> Any and all thoughts on this are welcome. It is mounted on the steering > column (2 screws) and the cable then goes into the steering column cover. In addition to the control lever, there is a control box in adjacent to the engine compartment. > Above 55 mph it surges, up and down, and then cuts out. Sometimes it just > cuts out! But it will not hold at all? With some luck this problem is related to the ones below, and could be fixed easily. However a cruise control system is a feedback control system and with the wrong unit surging and (in control theory lingo) instability is quite possible with a properly functioning unit if it is not matched to the vehicle/engine in question. > When it is working, if you > 1) blow the horn > 2) put on the turn signal > 3) dim or raise the headlights > and probably other things I haven't found yet! It cuts out - as though you > had tapped the brake. My first guess for this problem is that it is related to voltage fluctuations being interpreted as "off" signals. You can try: a/ Check voltage and ground connections. If you have a voltmeter check so that voltage is constant during case 1-3 above. b/ Check all other wiring. c/ If a and b doesn't help try moving it's positive voltage connection to another fuse. Try both a circuit separate from 1-3, and the same circuit as the brake light. Do you know from the prev. owner if it ever worked right? The off/ cut out signal could have been wired wrong. If all else fails find a EE control major and trade some help with his homework for some cruise control debugging. (noticed you're at umass. Nice school!) Good luck, Martin
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