daveturnbull Posted July 13, 2020 Share Posted July 13, 2020 200tdi vintage bits. Wipers stop wherever they are when you turn off the switch. Intermittent setting does nothing. I've changed the park switch on the wiper motor, no difference. Also changed the relay, no difference. Where do I look next? Quote Link to comment Share on other sites More sharing options...
Retroanaconda Posted July 13, 2020 Share Posted July 13, 2020 Lost the permanent 12v supply to the motor? Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted July 13, 2020 Author Share Posted July 13, 2020 Sounds plausible. Any idea of the wire colour for that one? Quote Link to comment Share on other sites More sharing options...
Retroanaconda Posted July 13, 2020 Share Posted July 13, 2020 I think green? But don’t quote me! Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted July 14, 2020 Author Share Posted July 14, 2020 Well it's not that. I have a good 12v on green. Quote Link to comment Share on other sites More sharing options...
landroversforever Posted July 14, 2020 Share Posted July 14, 2020 Dirty contacts in the park switch? Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted July 14, 2020 Author Share Posted July 14, 2020 Nope. All nice and clean. I think the fault is elsewhere as intermittent doesn't work either. Maybe the switch, but I don't have a spare to try. Quote Link to comment Share on other sites More sharing options...
western Posted July 14, 2020 Share Posted July 14, 2020 Replace the intermittent red case relay. Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted July 16, 2020 Author Share Posted July 16, 2020 (edited) That was the second thing I did after replacing the park switch. Edited July 16, 2020 by daveturnbull Quote Link to comment Share on other sites More sharing options...
western Posted July 16, 2020 Share Posted July 16, 2020 Only thing left is the stalk, the stalk for intermittent capable wipers is different to the older flick wipe stalk. Quote Link to comment Share on other sites More sharing options...
Jut Posted July 16, 2020 Share Posted July 16, 2020 had similar on my td5, changed home switch on motor, relay etc. no better, re-replaced the the park switch with an original from LR and worked fine. Quote Link to comment Share on other sites More sharing options...
Snagger Posted July 17, 2020 Share Posted July 17, 2020 Check the voltage on the park switch input and output. Parked, with the ignition on, the switch should receive 12v but give nothing out, with the wipers in any other position, the switch should be putting 12v out. You just need to work through the system to find the break in the circuit that is stopping the motor from getting current. Quote Link to comment Share on other sites More sharing options...
Maverik Posted July 17, 2020 Share Posted July 17, 2020 Does intermittent work when you use the squishers? Quote Link to comment Share on other sites More sharing options...
western Posted July 17, 2020 Share Posted July 17, 2020 Somewhere in here is a couple of photos I posted sometime ago of the park switch wire connections & colours, Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted July 17, 2020 Author Share Posted July 17, 2020 11 hours ago, Maverik said: Does intermittent work when you use the squishers? No. Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted July 17, 2020 Author Share Posted July 17, 2020 So, bit more testing. With the plug pulled off the wiper motor, I have 12v volts on the following at the given switch positions. Green - permanent Red / green - speed 1 Blue / green - speed 2 Brown / green - intermittent If I leave the intermittent setting switched on and reattach the plug I hear the relay click and then again a few seconds later, but it only does this sequence once, and the motor doesn't move. I happened to have a spare (but lazy) motor, so tried that one and get the same behaviour. Quote Link to comment Share on other sites More sharing options...
DaveSIIA Posted July 18, 2020 Share Posted July 18, 2020 Can you back-probe the connector and check for 12V while connected? Could be a poor connection somewhere in the intermittent relay / supply. Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted July 18, 2020 Author Share Posted July 18, 2020 So, with the connector plugged in, I get the same as above, except the intermittent which is 0v and I can hear the relay click as soon as I turn on the switch. Quote Link to comment Share on other sites More sharing options...
Maverik Posted July 18, 2020 Share Posted July 18, 2020 Try unplugging the squished at the actual pump units, then see what happens with the wipers. Quote Link to comment Share on other sites More sharing options...
steve b Posted July 18, 2020 Share Posted July 18, 2020 2p worth Check the earth tag under the wiper motor clamp screw , a dodgy earth point when good .... Beyond that , I reckon powering it up at the motor plug to check park circuit could be the next step ? Steve Quote Link to comment Share on other sites More sharing options...
Snagger Posted July 19, 2020 Share Posted July 19, 2020 The way the system works is quite complicated, with the power going to the motor first, then through the switch and back again. The motor is clearly not the problem, and it seems the relay is working. If the park switch is open contact with the wiper parked but closed and passing current (test it) for the rest of the cycle, then I think your problem is in the steering column switch. Quote Link to comment Share on other sites More sharing options...
Maverik Posted July 19, 2020 Share Posted July 19, 2020 I had a strange earth issue on my 1990 camel 110 which had very similar symptoms, I traced it to the swisher pump, I was getting 12v up the relay to squisher earth which caused some very strange behaviour. - hence my comment disconnect the pump and see how it acts. 1 Quote Link to comment Share on other sites More sharing options...
Snagger Posted July 19, 2020 Share Posted July 19, 2020 Can’t hurt to try that. Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted July 19, 2020 Author Share Posted July 19, 2020 17 hours ago, Maverik said: Try unplugging the squished at the actual pump units, then see what happens with the wipers. Just tried that, no change. Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted July 19, 2020 Author Share Posted July 19, 2020 I also just took the park switch off the motor, but left the electrical connections in place. Still no change in symptoms. The only bit I've not replaced (as I don't have one) is the switch. Anyone have a spare 200tdi wiper switch knocking about that I could borrow for a test? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.