The front relay bank has a “daisy chained” ground buss that seems to be causing a lot of problems as they age. What I think causes the problem is the double wire crimps were made without twisting the two wires into one group. So each wire got rolled to each side of the terminal and made weak crimp connections. Open barrel terminals are designed to have the rolled edges penetrate the wire at the center.
To make a new ground buss you will need:
1) 48.1 inches of 16 AWG black wire. I use AlpaWire type 3057 from a 1000 FT spool but any 300 volt 16 AWG preferably tinned.
2) 7 pn 42100-1 relay pin terminals. At Mouser these are 19 cents each
3) 1 Molex pn 19189-0015 butt splice terminal. At Mouser these are 19 cents each
4) 1.25” of .250” heat shrink tubing.
Tools needed are:
1) Wire cutters
2) Crimper for open barrel terminal
3) Crimper for closed barrel non insulated terminal
4) Heat gun for shrink tubing
5) Large paper clip to remove the old terminal from sockets.
The Butt terminal is rated for 10 AWG to 12 AWG and will just fit four 16 AWG wires in each end. You could use an insulated butt terminal but the one I specified is very heavy duty so the crimp should never have a problem. You can solder it but you would need a high wattage soldering gun to heat up the large mass of wires. I don’t recommend soldering.
Cut one wire each of the following lengths for one end.of the butt connector.
1) 6.4 inches
2) 5.2 inches
3) 4.5 inches
4) 2.7 inches
Strip one end of each and crimp into one end of the butt connector.
Now cut one wire each of the following lengths for the other end of the butt connector
1) 18 inches
2) 4.9 inches
3) 3.7 inches
4) 2.7 inches
Strip one end of each and crimp into the other end of the butt connector.
Slide your heat shrink tubing over the butt connector and shrink.
Now strip the seven shorter wire end of the wires and crimp on a new relay pin. Remove the OEM daisy chained pins for the front relay sockets (you will need to lift that relay bank and remove the relays). To remove the pins, I use a large paper clip to press the retaining nub while pushing and pulling the wire. Note there is one extra ground wire (center pin) on the fan relay socket that I do not use (not needed).
Grounds:
Fan Fail = pin 30
Fan Relay = pin 85
Dome unit = pin 86
Blower 4 = pin 85
Blower 3 = pin 85
High beam = pin 85
Low beam = pin 85
Cut the original ground wire that went to the low beam relay so you can connect the long 18 inch wire on my new ground buss to it. The 18 inch wire is long enough to let you make that butt splice back into the large group of wires to hide that splice.
I really don’t want to manufacture these and sell them. So this info is public for someone to do so if they wish.