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fixed chronic cruise control

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

This topic is in the MVS Volvo Repair Database » 1998 Volvo v70 xc - awd fuel pump Fix
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georgegrimm
Posts: 8
Joined: 21 June 2009
Year and Model: 96-960, 98 v70r
Location: fresno, ca

fixed chronic cruise control

Post by georgegrimm »

I posted about a chronic problem with my V70R crusise control. I read everything on the forum. I tested the column switch, the brake pedal switch, and checked the vac. lines under the battery. All was ok, I looked at the cc module, under the fuzes, opened it and damaged the connections to the exterior male plugs. I resoldered them. Results were negative. However, I pulled the module once more and decided to check the soldered connections with an ohm meter. One was open! I resoldered it. Upshot, Cruise control work fine. Praise God.

Note of interest: The ABS module had the same failure, the primary connections to the exterior male plugs failed. Thanks to all of you who put the info on the forum I was able to fix the ABS module myself. Now it looks like the same issued occurred on my cruise control module. I suspect engine compartment temp. is high from the turbo, causing the modules to fail. I wonder if the door lock module located behind the glove box could have the same issue?

My door lock remote fob has been chronic for the last year. I have to push the fob 20 or more times to get it to unlock or lock. I've changed the battery. Since it's chronic, comes and goes, I am going to look at the module behind the glove compartment. Seems like it could be the same issue-failing solder connections or bad circuit board. It seems like if a solid state component fails it should be bad all the time and not chronic, it wouldn't come and go. Where as a broken solder or circuit board connection could be chronic. Anyway, I'll let you know what I find out in a week or so.
George

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