91' XJ40 Soverign No Hazard Lights
#1
#2
#3
Join Date: Feb 2014
Location: Crossroads of America
Posts: 19,392
Received 12,739 Likes
on
6,380 Posts
Hi Jagbro,
According to the 1991 Electrical Guide, the hazard switch receives battery power from fuse A1 (2 Amps) in the right hand fusebox (at the base of the right A-pillar).
The actual "flashing" function is handled by the Central Microprocessor (CPU). When the hazard switch closes, it connects pin 6 of the CPU connector LB13 to logic ground 4.
A known issue is water contamination of the CPU electrical connectors or the case and circuit board due to plugged A/C drains that allow water to pool under the evaporator and to slosh over onto the CPU when turning left.
You can download the Electrical Guide at the link below, courtesy of our member Gus and his website, jagrepair.com:
1991 XJ Electrical Guide
Please keep us informed.
Cheers,
Don
Last edited by Don B; 01-26-2017 at 08:53 AM.
#4
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)