The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

780 Turbo Cruise Control Problems

posted by  brettsutherland on  Tue May 1 12:22 CST 2007
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Fri Apr 22 13:00 CST 2011
[RELATED]

When I bought my 780, the cruise control was not working. We have finally got around to trying to diagnose and repair it and have run into some weird problems. All electrical and vacuum circuits check out. We have tried three different speedo heads for the speed pickup, we have also tried three different cruise control modules with no improvement. The only problem we can find is that although all the inputs to the module are as the wiring diagram requires, the output on the yellow and red wire to the vacuum pump is dead ... on ALL three modules we tried. We tested the vacuum pump by jumping it with 12 volts and it runs properly. The leads from the switch stalk on the steering column all check out OK. Anyone got any ideas what the heck is going on ?? We'll appreciate any help you can give us .

Brett
--
Brett Sutherland & the 1.5 million mile 122 CANADIAN --- WINDSOR, Nova Scotia the birthplace of HOCKEY www.ecvintagevolvo.com






USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.