Glow Plugs - Previously, the glow plugs were wired to a momentary toggle switch which I held for the desired amount of time. This time I decided to use a timer. DEI makes a "universal" timer (model 528T) that can either turn on or turn off power after a desired amount of time, adjustable from 0-60 seconds, and is triggered by a 12v pulse. I bought it for $10 on ebay. The built in relay is rated for 15 amps, so I used an external glow relay for a powerstroke ford from Napa that brownbear posted about at one point. The momentary switch get poser from the low draw fuse block and is used to pulse the timer to initiate the cycle currently set for 5 seconds. The timer then supplies power to the relay coil and triggers the the glow plugs. The common voltage for the relay is supplied from the battery via the high-draw fuse panel. After five seconds, the timer switches off. This way I no longer have to hold the glow switch, and I can adjust the timer based on season/climate. I haven't cranked the engine yet but I've tested the circuit and it appears to work exactly as it should. I also rewired the glow lamp in the gauge cluster from the HJ to illuminate when the plugs are activated.
4WD - The split t-case behind the 1HZ is vacuum actuated. Since the HJ solenoid is 24V, I decided to try and make my own from the mini truck units available from Toyota (
see write up in the 60 forum). The wiring is pretty straight forward. I rewired the HJ 4WD switch to control a SPDT relay with power from the low-draw fuse block. The normally closed circuit send power to the "off" solenoid, and when the relay coil receives power from the switch, I send power to the "on" solenoid instead. After testing the everything works as it should, but unfortunately the HJ solenoids are wired with out connectors, so i need to find a pigtail from a 62 before I can finish the install.
Aux Fuel Pump - This was very straight forward. Common power to the relay comes from the high-draw fuse panel, and the relay coils receives power from the low-draw fuse panel via the ignition switch.
Fuel Heater - The heater in the Racor filter was wired the same way as the fuel pump, only a there will be a switch on the dash to control the relay coil so it can be turned off when not needed.
Other stuff - Other things I pre-wired include two aux power supplies that will eventually be mounted under the tuffy console, the indicator lights for the lockers, and the "Filter" light from the HJ for a water sensor for the Racor.
FYI, summit racing sells a weather proof connector kit I used for all the under-hood connections. It came with a bunch of 1-4 wire connectors an everything you need to install them. Also, radio shack has some inexpensive 2-wire connectors that are a little less bulky and work great under the dash.
pics to come...