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#1
04-17-2009, 12:06 PM
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1989 cruise amplifier fix
For those with cruise control not functioning, or funtioning poorly. ie, mine was hunting, surging, and sometimes would not engage at all. I heard that re-soldering poor connections was a poosible cure. I tried this to no avail. So - with nothing to loose - I used my propane torch on a low setting, amplifier outside on a level surface (portable vice) and quickly passed the tip of the flame over all solder connections, just long enough to see them melt and then kept it moving. Logic being with that much heat the solder would melt quickly and yet not damage the components on the reverse side. Anyway - installed and all is well - all functions work as they should. We'll see how long it lasts.
Cheers. 
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#2
04-17-2009, 07:44 PM
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I've been thinking about doing that - glad to hear it worked and that you let us know!!
Mike (Flambe) R.
__________________
There is a very fine line between "hobby" and "mental illness." FrankenBenz: '87 560SEC with an '02 cammed LS6 and custom 4L60E. Bling: '87 560SEC, ported/polished, lowered Lisa: '87 560SEL, lowered
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#4
11-09-2011, 11:36 AM
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Great Idea!
My cruise control amp has worked intermittently too and now has died in this colder weather! Think I will try this approach!
__________________
 1989 300E 2005 Acura TL 2011 Hyundai Elantra Limited Swing hard! Take chances!
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#5
11-09-2011, 08:45 PM
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Toaster Oven!
After briefly going over the circuit board with my butane touch my amplifier has now shown signs of life. It works somewhat intermittently but at least it has a pulse! I only blanket covered the board with the torch unlike the original poster who hit each joint to the point of melting. I will try that later.
Maybe I should just throw the circuit board into the toaster oven and set it for 300+ degrees for 30 minutes? LOL!
__________________
1989 300E 2005 Acura TL 2011 Hyundai Elantra Limited Swing hard! Take chances!
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#6
11-09-2011, 08:56 PM
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Good luck. I think I would have tired this if I had thought of it. I soldered most connections, concentrating on the capacitors. It would work for a while, then fail. As a last resort I replaced the capacitors and its been perfect ever since. Its very possible that the act of replacing them simple insured a clean solder point and that the original caps were okay. I am just glad I have cruise!
__________________
1991 560 SEL / 185k miles 1992 750il / 17k miles - project car
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