Welp I'm still running the hard wire from battery to FSS. Seemed to be working fine for now until I can permanently fix the wiring (**see below, I tried!) ... Now I am experiencing randomly every 4 or 5 cold start attempts the very same symptoms as before installing the manual gp harness kit ... clip wire to FSS, get in cab turn key on and hold gp button switch for about 5-8 sec. (I've tried different time lengths up to about 13 sec) I'm holding the button on while cranking starter and when the truck starts to idle I release the button. Starts cold as normal, but every once in a while the truck fires up for a second sputters then dies, like I have no glow plugs. Then I have to crank the starter for 10 sec. getting nothing, with a minute break then try again, nothing for about 4 of these cranking sessions, then she fires right up and runs smooth and strong. Sorry I know this isn't rocket science but am I doing this correctly? Is this operator error? On my other truck I just hold the button on for same amount of time then release it before I crank the starter ... it starts up quick when cold as normal with this procedure.
Also when I lost power to the FSS now that other switch behind the power-in spade, cold advance I think it is, is not working as the truck used to high-idle for a while cold until it warms up a bit then the rpms drop. Could this have anything to do with it?
** I ran a clean in-line fused wire from the FSS thru the firewall into the cab to fuse box. Found a slot that had power only with the key on. It will not get the fuel pump to pump fuel. However the FSS does click on when I touch the spade with the new wire. Is it not getting 12V? Why did I even go inside with the wire? Couldn't I just run it to the starter relay or somewhere under the hood to get 12V when the key's on?? Thanks for your help as always on this as I stumble around on what I think is still a simple problem I just can get right.