Pre-heating timer pin layout vs wire colors (1 Viewer)

[Justcruzin]

Hello all.

Pre heating duration has dropped to near zero on my 12v 2H HJ47 so time has come to go to semi manual control.

Not ready to move to a fully manual Wilson switch yet, I understand it is very simple to by-pass only the timer part of the "computer" which is controling glow plug function.

As I read it here, all I have to do is manually energize pin# 1 on the pre-heating timer using a momentary switch.

My question is: which pin is pin# 1 ?

Anyone here know what color is the wire that comes out of pin# 1 on the pre-heating timer??

Again, my rig is a 1983 HJ47 w/ 12V 2H from Australia.

All help is appreciated!

Thx much.

 

[Freewheel]

From the 1985 2H manual;.

 

[Davaa]

Not to hijack this but do I leave the plug to pre-heater timer unplugged to go manual switch?

 

[John Galt]

Pre heating duration depends on the temperature sensed by the pre-heat temperature sensor located in the engine thermostat housing. Simply unplug the sensor at the Tstat housing and the pre-heat should come-on for the maximum 14 sec every time the key goes to start. That's how to test the pre-heat.

 

[Justcruzin]

Thx Freewheel.

I wonder if pin layout is the same:

1- From year to year (I supppse so)
2- No matter if vehicle was equipped with Superglow or not (mine is...)

Appreciate the input!

 

[Freewheel]

Not sure what changes there are between years and models. If you take the plunge, let us know how it works out. I may have to do the same thing at some point- my timer seems to be getting erratic in it's old age...

 

[tlaporte]

According to my EWD pin #1 should have a Y-W (yellow wire with white stripe) connected to it, which goes to the temperature sensor mentioned above by @John Galt.

This is for "Land Cruiser FJ, BJ, HJ 40 Series" trucks, so should apply to your vehicle.