Do modern cars have intermittent wiper relays ?
It should be possible to obtain the appropriate relay from a scrappies and find a wiring diagram on the web.
My route to it in the SAAB 99 was to find the Diagram for a 90/900 in the Haynes manual (They three were essentially the same car with a bit of body work development) scratch my head for a bit trying to compare it to the 99 one and then give up and hit google.
This told me what to do with the intermittent stalk and relay I had from a 90, I then obtained an adjustable intermittent Wash Wipe from a Golf (which used Hella electrics) and just plugged it!
I can’t find the diagram I used in the end, but it should be possible to find a post that either has a diagram for a Landy or someone that can tell you what to do. The Landy probably has similarly simple electrics.
I’m sure it was something ridiculously simple like adding a wire from switch to relay for the intermittent and that was about it. By far the trickiest bit was bringing the relay under the dash rather than in the Engine bay so I didn’t have to cram any more wires through the grommet.Posted 4 years ago
I’ve got a 1990 Land Rover Defender.
It had a 3 position (off, slow, fast) wiper switch.
When it broke I bought a second hand 4 position (off, intermittent, slow, fast) switch.
I’d like to be able to use the intermittent option.
There’s a place next to where I work that buys and sells, and sometimes weighs in, cars.
I’ve had a look through a few scrappers, but can’t find anything that looks like a wiper relay, nor a flasher relay, for that matter.
Do modern cars use intermittent wiper relays, or is it all done via the ECU these days ?Posted 4 years ago
I’ll buy a new one if I have to, but I’d rather blag a free one if I can.
it’s frequency is supposed to increase with the speed of the car
I guess that’s why they control them via the ECU nowadays so they can do fancy tricks like that.
…Land Rover Dealer…
First rule of owning a Land Rover; Never buy anything from a main dealer.
New ones are only about a tenner on ebay. I just thought for the sake of popping next door, I’d try to get a free one off a scrapper if someone had come up with a quick answer like “Ford still use them” or something like that.Posted 4 years ago
I’ve found the fuse and relay boxes on a few of the cars, but nothing that looks like a wiper or flasher relay.
I guess if they became obsolete 15 years ago, and he’s got nothing older than 10 years, I’m not going to be in luck.SaccadesMember
All the rover cars (Actually, not sure about the 75/ZT) did.
Although thinking about it, the actual motor had 3 power tracks inside (I had to drill out the bolts, clean the excess grease and solder a new contact into mine when it died, as there were no rover carcasses to dig into), so if you have the stalk would you not just need the rover 25/zr motor instead – about a fiver from a scrappers.Posted 4 years agoglobaltiMember
My 1986 Land Rover 90 had only the three positions and only the wiring for them so when I cannibalised a Defeneder wash/wipe stalk and relay, I had to make up a supplementary harness to connect the stalk to the wiper motor. The nice folk at Autosparks did it for me for a few quid and it went into the dash alongside the old wiring.
One useful mod you can do while you’re at it is to replace the two single washer nozzle stalks with a pair of twin Defender nozzle stalks. The pump has more than enough power to squirt through four nozzles. It’s an easy job but you need narrow fingers to get to the backs of the stalks and remove then replace the little plastic nuts.Posted 4 years ago
I decided I’d spent long enough trying to do this on the cheap, so went and bought a brand new relay for under a tenner.
Very helpfully, it’s got the terminals clearly marked on it.
Which match up nicely with this diagram.
That one mentions the VW relay too, but I’d just confuse myself if I tried to think about how long a wait I wanted between wipes while driving. A simple on/off suits me better.
globalti, I’ve already modified the washers. Mine had the even more basic single twin jet in the centre. I replaced it with a T connecter and two pipes running up to truck style twin jets mounted on the wiper arms themselves.Posted 4 years ago
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