Chaps, I fitted some tripppple squirters recently and whilst quite jolly, the old pump just couldn't give enough pressure to make them useful. So I decided to fit another modern in line pump. Now, I have rigged it so I know it works and it blasts the windscreen even when it's dragging through the old pump which I disconnected. The plan is to have both running. I have put the pump in, wired with it's own relay and a fused supply. All good. I thought I'd simply take a spur off the feed wire to the original pump so when I press the button on the stalk, the pump runs, fires the relay and the big boy runs too. Sound logic?
OK so I identified the three old pumps, headlights, screen and rear screen. Forget the lamp washer it totally separate. Both remaining motors had two wires each. One commonly coloured which I took to be the return and one similar coded but different coloured wire which I took to be the feed. I tapped in and fired it up. Well all sorts happened. The wipers wouldn't park, the new motor ran without me pressing the stalk button it was crazy. So I figured that it must be the other one - swapped the tap over and got even more weirdness. I reinstated the original wires and every does work fine. I figured that as the whole tank was plastic it would need a physical earth connection. I get car electrics to a basic degree and kinda understand testing. But what's really difficult is when you have to hold a wire, push the tester probe in, read the screen and be in the driver's seat at the same time! Not easy.
Any thoughts on how the system works? Going to dig out the wiring diag, but sometimes they make little sense. I do not want a switch on the dash to operate the washers. Just to reiterate, with everything wired and plumbed in, if I fire the relay from the battery with a flying lead, the new pump works perfectly - it's not a wiring issue as far as I can see. I really can wire up a relay.
Chris
OK so I identified the three old pumps, headlights, screen and rear screen. Forget the lamp washer it totally separate. Both remaining motors had two wires each. One commonly coloured which I took to be the return and one similar coded but different coloured wire which I took to be the feed. I tapped in and fired it up. Well all sorts happened. The wipers wouldn't park, the new motor ran without me pressing the stalk button it was crazy. So I figured that it must be the other one - swapped the tap over and got even more weirdness. I reinstated the original wires and every does work fine. I figured that as the whole tank was plastic it would need a physical earth connection. I get car electrics to a basic degree and kinda understand testing. But what's really difficult is when you have to hold a wire, push the tester probe in, read the screen and be in the driver's seat at the same time! Not easy.
Any thoughts on how the system works? Going to dig out the wiring diag, but sometimes they make little sense. I do not want a switch on the dash to operate the washers. Just to reiterate, with everything wired and plumbed in, if I fire the relay from the battery with a flying lead, the new pump works perfectly - it's not a wiring issue as far as I can see. I really can wire up a relay.
Chris