gheebhow 4 Posted May 1 Hi all, I’d be grateful for some electrical advice please. I’m ready to book an MOT – but the windscreen washer pump isn’t working. I’ve changed the pump, and tried a different steering column control, but no difference. I’m getting voltage at the pump when the control is pressed – but it’s only 7V which gradually works its way up to 8V after about 15 seconds. The pump itself works weakly if connected to a 9v battery. The fuse (no 1 according to Haynes but no 6 according to the glovebox handbook) seems to be fine, with clean connectors. So I think the problem must be somewhere in the wiring. And I’m guessing that it’s under the dashboard, maybe connected with an aftermarket alarm (now dead) that was wired in ages ago. But are there other things I can / should check? Would one of those non-contact voltage tester help? I’m not so sure because if 7V is getting through, that’s what it’ll show isn’t it? Should I try connecting a battery to the multi-plug on the steering column to see if 12v gets through when connected direct? Any advice welcomed! I'm feeling my way through this one. Thanks. Quote Share this post Link to post Share on other sites
sheffieldcortinacentre 747 Posted May 1 Far as I know it should get 12v, it's a basic circuit so nowt else really is the earth wire connected under one of the stalk mounting bolts ? Can't remember if this effects it. 1 Quote Share this post Link to post Share on other sites
gheebhow 4 Posted May 2 Thanks. Yes the earth looks good. I'll keep trying - there must be some resistance somewhere. Any other suggestions welcomed. Quote Share this post Link to post Share on other sites
sierra3dr 53 Posted Monday at 04:46 AM Replace to eliminate....part number 83BB17K624AA Quote Share this post Link to post Share on other sites
sheffieldcortinacentre 747 Posted Monday at 04:04 PM That's sierra part number may have the square plug. Quote Share this post Link to post Share on other sites
TimB 98 Posted Tuesday at 05:19 AM Is the car a MK5? if so I'll look in my crap Haynes manual then make suggestions. I presume all other electrics are working and the battery shows good voltage. Quote Share this post Link to post Share on other sites
bortaf 92 Posted 9 hours ago (edited) Check fuse 6 for resistance and check for green snot around the 2 bulkhead loom plugs below the fuse box, if you can pull them appart and clean the contacts, they can very! hard to pull appart. As an aside the haynes manual is an exact copy of the factory manual. Edited 9 hours ago by bortaf Quote Share this post Link to post Share on other sites
sheffieldcortinacentre 747 Posted 8 hours ago 1 hour ago, bortaf said: Check fuse 6 for resistance and check for green snot around the 2 bulkhead loom plugs below the fuse box, if you can pull them appart and clean the contacts, they can very! hard to pull appart. As an aside the haynes manual is an exact copy of the factory manual. Inc the same mistakes lol like headlight relay ( discontinued on mk4-5). Quote Share this post Link to post Share on other sites
