I have a 1989 F-series with a bad temp gage in the cluster (the sender is good), instead of fixing it, I would like to install an aftermarket electric temperature gage. What is the easiest power source to hook into that is turned on/off by the ignition switch (run mode)? Is there an open spot in the fusebox to tie into? Thanks in advance for the help.
Bubba

 

Where are you mounting the guage? You can use the fuse block if need be. Just look for a key on fuse such as radio.



'93 F-150 loaded and modified!
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Pastmaster,
The gauge will go in my plastic A-pillar gage pod above my mechanical oil pressure gauge....which also needs power for lighting.
Yes, the fuse panel is a good source, it is just a pain-in-the-_ss to access and feed a wire into. Do you have a good method for connecting to the fuse box? Do I splice into a fused wire or can I attached a connector to my gauge power lead and just "plug & play" ?
Thanks.

Bubba

 

If you connect 12v from your fuse panel to your new gauge, it will vary the same as your battery voltage. Although after market gauge suppliers tell you to do this (auto meter in my case), your accuracy will suffer. Because your battery voltage fluctuates between 11 -14 volts, your readings will follow. This may not concern you, and if so, then fine. I installed a 10.5 v zener regulator circuit in the cluster I put in my 54 F100. However, if you go to the trouble to either put in a regulator or find the supply from your present instruments, you may as well just replace the original gauge. Either way is a hassle.

Winford