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HZ Wiper dwell relay - Help needed

Hi all, I'm needing help with a faulty wiper dwell relay in my HZ.

1 - Does anyone have a circuit diagram for these relays?
2 - Does anyone know how to open the casing on them?

Any help is much appreciated
Cheers, Evan.

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http://www.dnt.com.a...
page 424 is the vb commodore wiper wiring diagram might help figure 12-25 shows how holden sneaked the wiring into the commodore lume (it wont really help you)

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go on yank run out on us

looks the same as early commodore and WB...a few avail on line...I don't think it would be serviceable and it would be a fairly simple timer circuit with variable resistor input. No doubt a universal one could be made to work. If you want to open it up looks like you could carefully cut a side off with a hacksaw...you may be able to access and clean a contact or two - thats about it..may get it working though and glue/seal the side back on...

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Andrew

Cheers mate, though I'm actually looking for a circuit diagram of the internal components of the relay

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the WB wiring diagram only has this level of detail...3 inputs to the delay circuit who's output energises the relay coil, I'd expect the delay circuit to be something very simple like the basis of a 555 timer...or typically a simple dual transistor timer circuit using an RC combination (the dwell pot being a variable R)... it wouldn't be anything too sophisticated - a couple of discrete components at most..

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Andrew

Cheers Andrew. I've been informed on another board that you can carefully cut the glued joint around the edge of the the connector face and lift the circuit board out (see attachment). The fault looks to be a failed pair of capacitors which have vented their electrolyte.

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hopefully an easy fix for a few $$ and transistors still ok - good luck..

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Andrew

Are they that hard to find now they used to be the sort of thing you couldn't give away every time I try fix pooped capacitors theres all ways something else wrong that caused the capacitors to pop

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go on yank run out on us

Quite simply, one of the main reasons I bought the HZ was to broaden my experience in understanding cars and fixing things, so I'll endeavor to fix it, and if that doesn't pan out, I guess I'll just have to buy another relay

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