Fuse Block Upgrade
So I decided to replace the original 5 fuse block with a new OEM Toyota 6 Fuse block. I have not had electrical issues but I wanted to take the preventative approach and I figure the chances are good that a 40+ year old part could use replacing so...
I broke out my new reference material I got from Jim (Ironmanfj45) and compared the 5 fuse wiring diagram with the 6 fuse diagram along with the wiring diagrams in my Haynes manual. Thanks Jim! I had a pretty good grasp on what went where and decided to go forward with it...
You can see the 6 fuse block I ordered from CDan along with the other parts...
The first obstacle was determining where the wires would connect on the new block compared to the old one. After reviewing the diagrams and testing the switches on my 5 fuse block here's what I came up with...
5 FUSE BLOCK
1- 30AMP LIGHT (BATT)
2- 30AMP WIPER (BATT)
3- 5AMP METER (SWITCHED)
4- 15AMP TURN (SWITCHED)
5- 15AMP HORN (BATT)
The new 6 block configuration was...
6 FUSE BLOCK
1- 30AMP LIGHT (BATT)
2- 30AMP HORN (BATT)
3- 5AMP SPARE (BATT)
4- 15AMP METER (SWITCHED)
5- 15AMP WIPER (SWITCHED)
6- 15AMP TURN (SWITCHED)
My plan was to wire up the new fuse block so the cover would correspond with the appropriate switches to limit the confusion later when I had to troubleshoot fuses, etc. So I would need to switch up the wiring to match the 6 fuse block.
The first thing I realized was that the wires came in on the left side of the old fuse block and would need to come in on the opposite side of the new fuse block. There was not a lot of wiggle room for the wiring so I actually dropped the loom a little by flipping one of the loom retainers just above the fuse block which gained me about 1.5" more to work with. I also flipped the two sets of wires that dropped down to the fuse block to either side of the HI/LO shift linkage. You can see the flipped loom retainer (with ground) and wiring here...
Once I had as much free play as I could gain I went to work wiring the new block. The top fuse remained the "LIGHT" circuit, the second fuse was now the "HORN" circuit (I took from the #5 spot on the old block) and the third fuse would be a spare (BATT) fuse. But the "WIPER" wire was too short to reach the #5 spot so I just added it to the third (SPARE) fuse location and labeled it with electrical tape to remind me that it was not on it's correct (as far as the cover is concerned) circuit. The fourth fuse was now the "METER" circuit, the fifth was empty (since the wiper wire wouldn't reach) and the sixth was now the "TURN" circuit.
My main goal was to keep from cutting the wiring loom so the one wire change and no cutting was a pretty good trade off I thought. The wipers are now on the BATT side of the block but that's the original wiring on the 65 anyway.
Here's a pic of the original 5 fuse block with the wires coming in on the left side...
And the new fuse block with the wires coming in on the right side (you can see the with green tape with "WIPER" label)...
Here's the final product...
