Hi all,
After searching the forum pretty hard I found very small snippets of information on the factory fuel heater located on the fuel filter housing, but not near enough for me to confidently wire it in the best possible way for my application. If you know anything about how Toyota designed and wired it please throw it down in this thread.
The EWDs and manuals I have only show a 15A fuse in the main fuse box, but I don't discount that there might be more detail hidden somewhere I haven't looked.
My 2002 HZJ78L was single filtered (on firewall). I bought the factory mount for another filter and prefilter (on right hand side behind airbox), and chose the filter housing with heater. So I'll be running a factory prefilter and two factory filters with the heater on the first filter after the prefilter. But to wire it intelligently and efficiently I need to know the following:
1. from factory do these have a dash switch or are they just actuated automatically?
2. should my standard loom have everything already installed?
3. does it actuate internally on temperature or viscosity, and/or from some other signal to a factory relay I'm not seeing?
You can't tell from the photos but the internal heating plates are sprung. parts shown are 23380-17481 cap assy and 23910-17080 heater assy. These may vary slightly in form from what some may have had in their 80's, the particular heater part number is exclusively from 99-07 HZJ7#'s, though i doubt the functioning would be very different.
More photos in a following post.
Any enlightenment will be greatly appreciated.
After searching the forum pretty hard I found very small snippets of information on the factory fuel heater located on the fuel filter housing, but not near enough for me to confidently wire it in the best possible way for my application. If you know anything about how Toyota designed and wired it please throw it down in this thread.
The EWDs and manuals I have only show a 15A fuse in the main fuse box, but I don't discount that there might be more detail hidden somewhere I haven't looked.
My 2002 HZJ78L was single filtered (on firewall). I bought the factory mount for another filter and prefilter (on right hand side behind airbox), and chose the filter housing with heater. So I'll be running a factory prefilter and two factory filters with the heater on the first filter after the prefilter. But to wire it intelligently and efficiently I need to know the following:
1. from factory do these have a dash switch or are they just actuated automatically?
2. should my standard loom have everything already installed?
3. does it actuate internally on temperature or viscosity, and/or from some other signal to a factory relay I'm not seeing?
You can't tell from the photos but the internal heating plates are sprung. parts shown are 23380-17481 cap assy and 23910-17080 heater assy. These may vary slightly in form from what some may have had in their 80's, the particular heater part number is exclusively from 99-07 HZJ7#'s, though i doubt the functioning would be very different.
More photos in a following post.
Any enlightenment will be greatly appreciated.
