[Spruce]

I would remove the wiring for the controller and pump.

I would then wire up a 'test bench' using your leisure battery. There will be a cable joiners joining the pump to the controller.  Cut those off and strip them back so you can put the black cable to the negative and the red cable to the positive. Make sure there is a fuse in the positive cable. If you touch the wires onto the terminals that pump should run. If you start the engine the same thing should happen. The fuse should not blow.

Check the wires to the controller for damage. I would replace them. I would also try to ascertain that my wiring to and from the controller is correct. (We use Varistreams and they use red wire from the battery to the controller and red from the controller to the pump. They also use black from the battery to the controller and black from the controller to the pump.  You have to identify which is which by looking at the labels next to each connector. )

[richard groves]

Thanks Spruce for taking the time.
The controller and pump are wired up on a board removed from my old van, was working perfectly before with the old scr and have not needed to re wire anything.
When I tried to fit that scr in the new truck ( I worked methodically same as it was in the old van ) I ran into same problems as above,  blowing the controller fuse. So I bought a new scr with instructions ( logically thinking that would sort any confusion on my part ).
The fuse connectors supplied with the scr kit are the type that cut through the cable insulation when you snap them together.
The earth connections are crimped rings tek screwed to bodywork, because they self tap and cut their own hole into the metal, I have not sanded back paintwork to bare metal - could that be possible reason for a bad earth ?

Regarding terminal 4 and the light
the light is already wired in with a switch on the positive cable and connected to the leisure battery + and - by 2 core household  electric cable.
If I'm understanding correctly I can use the already fitted fused positive cable from the scr to connect to the positive of the light ( what was connected to leisure battery ) and just change it at the scr to terminal 4.
But what happens to the negative cable of the light ?
Please excuse my ignorance 
simon

[richard groves]

I would remove the wiring for the controller and pump.

I would then wire up a 'test bench' using your leisure battery. There will be a cable joiners joining the pump to the controller.  Cut those off and strip them back so you can put the black cable to the negative and the red cable to the positive. Make sure there is a fuse in the positive cable. If you touch the wires onto the terminals that pump should run. If you start the engine the same thing should happen. The fuse should not blow.

Check the wires to the controller for damage. I would replace them. I would also try to ascertain that my wiring to and from the controller is correct. (We use Varistreams and they use red wire from the battery to the controller and red from the controller to the pump. They also use black from the battery to the controller and black from the controller to the pump.  You have to identify which is which by looking at the labels next to each connector. )

You've posted this whilst I was replying above.

Good advice and something I will do when time allows, for the remainder of the week, leisure battery is full and should last me, portable pump/battery box should arrive tomorrow and going to give that a go - tbh if that can withstand my busiest day of 5 hours continual use without running flat it may suffice and will be handy with regards to frost protection in winter as the back of the pick up will not be heated.

Simon

[Spruce]

Thanks Spruce for taking the time.
The controller and pump are wired up on a board removed from my old van, was working perfectly before with the old scr and have not needed to re wire anything.
When I tried to fit that scr in the new truck ( I worked methodically same as it was in the old van ) I ran into same problems as above,  blowing the controller fuse. So I bought a new scr with instructions ( logically thinking that would sort any confusion on my part ).
The fuse connectors supplied with the scr kit are the type that cut through the cable insulation when you snap them together.
The earth connections are crimped rings tek screwed to bodywork, because they self tap and cut their own hole into the metal, I have not sanded back paintwork to bare metal - could that be possible reason for a bad earth ?

Regarding terminal 4 and the light
the light is already wired in with a switch on the positive cable and connected to the leisure battery + and - by 2 core household  electric cable.
If I'm understanding correctly I can use the already fitted fused positive cable from the scr to connect to the positive of the light ( what was connected to leisure battery ) and just change it at the scr to terminal 4.
But what happens to the negative cable of the light ?
Please excuse my ignorance 
simon

Earth is to the body of the vehicle.

[richard groves]

Great Spruce, thought as much but had to check ! 

Thanks for all your help, will sort where I have gone wrong on the bench when time allows 

Simon