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



 VIEW    REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

About that relay jumpering... 700 1988

uid 18083's pic
posted by  lucid on  Wed Jan 9 02:39 CST 2008
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

In your first post you said:

"I pulled the main fuel injection relay and jumpered terminals 87/2 and 30 with a manual switch. Voila! Both pumps come back to life. Attempting to start the car with the pumps on using the manual switch did not work."

Whichever LH you have (2.2 or 2.4), your jumper substituted for the Fuel relay, but powers only the pumps. It's rare that the "other relay" fails (the one that should energize at Key On), but if it does (and I've had 2 cases in my family cars), there is no power to the AMM and ECU from 87-1.

To do a complete diagnostic relay bypass, you need a 3-legged jumper having flat male terminals to plug into the relay harness socket (or rack), as follows:

Leg 1 to socket terminal 30 (heavy Red wire, fused battery +12V)
Leg 2 to socket 87-1 (AMM, ECU, RS relay, etc.
Leg 3 to socket 87-2 (Pumps)

As with other jumpering schemes, the pumps run immediately. For more than a quick test, a control switch can be wired into the leg connecting terminal 30 to the other two legs.
--
Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.






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.