SAAB V4 Forum
SAAB V4 Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
 All Forums
 General Technical
 Rheostat Switch Recovery

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

Format Mode:
Format:BoldItalicizedUnderlineStrikethrough Align LeftCenteredAlign Right Horizontal Rule Insert HyperlinkInsert EmailInsert Image Insert CodeInsert QuoteInsert List

* Forum Code is ON
Smile [:)]Big Smile [:D]Cool [8D]Blush [:I]
Tongue [:P]Evil [):]Wink [;)]Clown [:o)]
Black Eye [B)]Eight Ball [8]Frown [:(]Shy [8)]
Shocked [:0]Angry [:(!]Dead [xx(]Sleepy [|)]
Kisses [:X]Approve [^]Disapprove [V]Question [?]

Check here to subscribe to this topic.

T O P I C    R E V I E W
WoodyPosted - 06 Sep 2009 : 10:37:22
Further to this topic:,switch

Last week-end when the weather was foul and I couldn't roll the Troll out, I looked for something I could do and started messing with two rheostat switches that didn't work.
Both had had the vinegar treatment but still were not functioning. I wanted to find out why. Closer inspection revealed that the internal metal contact wasn't in full contact with the wire coil as the springs which acted on the contact has broken or failed.
I opened up the switch after removing one end of each rivet. The two small springs which rest in the two holes in the central part had rusted away.
I found a compatible spring in a box of ancient carburettor parts
and cut two to length and re-assembled to switch. Now fully functioning.

7   L A T E S T    R E P L I E S    (Newest First)
john-saabPosted - 25 Feb 2018 : 07:09:04
A timely post resurrection..I have run out of working rheostats and have about 10 faulty units..that's this evenings desk job sorted.

'73 96 (Vernon),'74 95 (Veronica)plus 4 other 95's and 2 96's
stevebodPosted - 21 Feb 2018 : 16:59:41
Nice work.
Good write up too.
Just a thought on those rivets. Would be is possible to counter bore the plastic body a small amount to give a new shoulder for the shortened rivet to grip against?
john-saabPosted - 19 Feb 2018 : 07:46:58
Just to add a note on this.
When the rivets are too short to lap over they can still be used but find a short screw that is just larger than the internal hole in the rivet...screw that in and it will hold the 2 parts together. Beware of using a screw that gives a lot of resistance when tapping it in will either chew the rivet up or break the rheostat body.

'73 96 (Vernon),'74 95 (Veronica)plus 4 other 95's and 2 96's
x96Posted - 18 Feb 2018 : 19:18:39
Very interesting and great pictures, thanks.
it's written on my list.
I try to figure out a situation where is necessary to dimm the already very dimmed gauges lights and I don't find one.
Maybe anticipates the black panel feature

WoodyPosted - 06 Sep 2009 : 12:56:23
Whoops - Sorted !!

There was just enough material left on the rivets to splay for them to grip. A couple of small screws/nuts would be better.
DerekPosted - 06 Sep 2009 : 12:34:07
Excellent bit of tech. Amazed that you managed to get the pics of the 2 switches to look exactly the same.........................
john-saabPosted - 06 Sep 2009 : 12:31:05
My kind of car repairs..cost nothing but time! Might pull one apart myself. What did you use instead of the rivets when you put it back together?

Snitz Forums 2000
SAAB V4 Forum© 2000-04 Snitz CommunicationsGo To Top Of Page