Blitz Posted June 3, 2018 Report Share Posted June 3, 2018 Morning all. On my rainy trip back yesterday my wipers stopped working. I would get a few wipes then they both stoped. Turning them off and on again gave me a few more until eventually this had no affect and they stopped mid wipe. Iv not looked at them yet but the arms are solid in their positions so I assume the linkage is still connected or possibly Jamed. However I suspect the motor has gone ? I'm going to get a multimeter and check for power to the motor first. Obviously those who know me know a know nothing John Snow so all advise welcome please on this subject. Thanks Grant Link to comment Share on other sites More sharing options...
dougbgt6 Posted June 3, 2018 Report Share Posted June 3, 2018 Grant, I'd check the fuse box first for a poor connection, the prongs that "grip" the fuses are notoriously poor. Take the fuse out pinch the prongs together, re-insert fuse. It's the top fuse on mine, don't know what it is on yours, but there aren't many of them. I have a modern blade fuse box sitting on my bench waiting for installation. Doug Link to comment Share on other sites More sharing options...
Blitz Posted June 3, 2018 Author Report Share Posted June 3, 2018 Will do Sir. Good point Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 3, 2018 Report Share Posted June 3, 2018 Grant lm sure I spotted the circlip is missing off the top of your motor gear spindle , May be the motor has been rebuilt a bit squiffy the park switch might have given up Pete Link to comment Share on other sites More sharing options...
Anglefire Posted June 3, 2018 Report Share Posted June 3, 2018 Grant forgive me, I'm not good with names - I can recognise people years apart, but no idea of their names! Is this yours: I don't know if anything can be seen in this picture, if its the right one! Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 3, 2018 Report Share Posted June 3, 2018 Good one yes thats grants, im wrong thats a modern motor doesnt have a circlip must be one of the 1600s eg has a exposed gear shaft that knowone ever oils Pete Link to comment Share on other sites More sharing options...
Blitz Posted June 3, 2018 Author Report Share Posted June 3, 2018 Yep Pete not the usual model which left me buggered for starters. Iv got 12v supply to the motor and at the top red wire too. First off what does this single red wire do ? Underneath is a copper contact which rotates round a flat circular disc. However the motor will run without this connected. With encuragment I can get the wipers working but they are very slow and stop as if not enough power. How do I know if it's the motor or mechanism that's gone. A few pics. Whilst messing iv blown the fuse I think. It's under the dash on the passenger side ? I couldn't find it. It's not on the bulk head like later models. Grant Link to comment Share on other sites More sharing options...
Blitz Posted June 3, 2018 Author Report Share Posted June 3, 2018 Link to comment Share on other sites More sharing options...
Blitz Posted June 3, 2018 Author Report Share Posted June 3, 2018 Is that last pic supposed to be like that or a full circle. Ie has it disinterested? ? Link to comment Share on other sites More sharing options...
Anglefire Posted June 3, 2018 Report Share Posted June 3, 2018 Can you remove the clip off the drive and operate the wipers by hand? If they are nice and free then it is the motor end, otherwise it is the mechanism. Not much help and probably bloody obvious Link to comment Share on other sites More sharing options...
Blitz Posted June 3, 2018 Author Report Share Posted June 3, 2018 Not obvious mate I tried removing the other end lol. That obvious connection I didn't see Grant 1 Link to comment Share on other sites More sharing options...
NonMember Posted June 3, 2018 Report Share Posted June 3, 2018 19 minutes ago, Blitz said: Is that last pic supposed to be like that or a full circle. Ie has it disinterested? ? It's supposed to be like that, because... 23 minutes ago, Blitz said: First off what does this single red wire do ? Underneath is a copper contact which rotates round a flat circular disc. The red wire connects the -ve side of the motor (which is the switched side) to the not-a-full-circle thing. The rotating copper contact is connected to ground through the shaft. This is the self-parking mechanism - when the wipers are parked, the grounded copper contact is in the missing bit of the circle. When they're not, it connects the red wire to ground, thus energising the motor until it does park. Link to comment Share on other sites More sharing options...
NonMember Posted June 3, 2018 Report Share Posted June 3, 2018 By the way, some comments on the motor being "a modern one" or "not the usual model". The car appears to be a round-tail Spitfire. The wiper motor appears to be a Lucas DR3A. This is exactly the expected combination. Or am I missing something? Link to comment Share on other sites More sharing options...
Blitz Posted June 3, 2018 Author Report Share Posted June 3, 2018 Ok many thanks I did suspect it's the parking bit and explains that for me now. I noticed you can spin it to a just the parking position I assume. Link to comment Share on other sites More sharing options...
Blitz Posted June 3, 2018 Author Report Share Posted June 3, 2018 The spit4 should have a different motor and mechanisms but not sure of model number. This is a two speed model but only one of the wires if live on my car due to the original switch been used. Can some one tell me the model number I have fitted please if I need a replacement. Link to comment Share on other sites More sharing options...
NonMember Posted June 3, 2018 Report Share Posted June 3, 2018 Are you sure? The one shown does not look like a 2-speed. The 2-speed on the Mk4 / GT6 Mk3 has a round body. That one looks like a Mk3 single-speed type. The Canleys site seems to show the same wiper motor for all round-tail Spitfires, and Herald/Vitesse. Link to comment Share on other sites More sharing options...
AidanT Posted June 4, 2018 Report Share Posted June 4, 2018 The, well at least my mk1 GT6 has a similar looking motor and is a two speed Aidan Link to comment Share on other sites More sharing options...
Blitz Posted June 4, 2018 Author Report Share Posted June 4, 2018 I’m guessing two speeds as it has two wires from the loom fitted to the motor. One is live but I guess the other could be a neutral wire and I’m prob i bumb ass. I’m sure thinking about it it’s the latter doh. Link to comment Share on other sites More sharing options...
NonMember Posted June 4, 2018 Report Share Posted June 4, 2018 2 hours ago, Blitz said: I’m guessing two speeds as it has two wires from the loom fitted to the motor. One is live but I guess the other could be a neutral wire and I’m prob i bumb ass. I’m sure thinking about it it’s the latter doh. The standard, single speed, wiper motor for an early Spitfire has three terminals connected to the loom. One of these is a fairly obvious ground wire - it's a terminal on the case and the wire is black. The other two wires are a live feed (green, from the ignition-switched-fused circuit) and the connection to the low-side switch. Here's a photo of mine. Link to comment Share on other sites More sharing options...
Blitz Posted June 8, 2018 Author Report Share Posted June 8, 2018 Quick update. The mechanism looked fine so I opted to swap the motor. Visited Spitfire Graveyard which is local to me and picked up a second hand full unit for £30. Just fitted it today and everything is working fine. Wiper speed also a bit faster now. Thanks Grant 1 Link to comment Share on other sites More sharing options...
Anglefire Posted June 8, 2018 Report Share Posted June 8, 2018 Excellent news Link to comment Share on other sites More sharing options...
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