Hendrik Posted July 11, 2006 Share Posted July 11, 2006 In my (Japan made )wagon 1986 , 4wd , turbo , the light switch is combined with the parking light switch , and the inner axe has the dimmer function for the (digital) dashboard. See picture..... The high/low beam selection is with a separate up/down switch under the steer. Inside the housing of the switch are a lot of electronic components. The dimmer function no longer works , always on maximum , turning the inner knob does nothing anymore. And the "Illumination "fuse always burns out... All the lights work fine........ I did not find documentation for this switch , anyboy can help me ? Quote Link to comment Share on other sites More sharing options...
Cougar Posted July 11, 2006 Share Posted July 11, 2006 It sounds like you may need to replace the switch. The shorting problem may be due to a problem with the switch itself or in the lighting system. Quote Link to comment Share on other sites More sharing options...
Hendrik Posted July 11, 2006 Author Share Posted July 11, 2006 It sounds like you may need to replace the switch. The shorting problem may be due to a problem with the switch itself or in the lighting system. I am an elctronic engineer , but even so you need to know the ins and outs of the circuits. I have a FSM for an 88 model and also earlier ones : not for 86..... It is a bit complicated as some of the switching is done at ground level and some at +12 volt. I still doubt if it is the switch. Any way , in this country a Subaru is like an elephant in Alaska..... Parts : a dificult story , junk yards do not have them. I believe to be able to fix it , if I have the right docs..... Quote Link to comment Share on other sites More sharing options...
Cougar Posted July 11, 2006 Share Posted July 11, 2006 I'm an electronics tech. Using your DVM will tell you what wires are hot or tied to power and which ones go to ground or have a load on them. I would think the electronic components you saw in the switch are used as a regulator circuit for the dimmer. Other lighting controls are usually just make or break switch contacts. Since the dimmer isn't working I would suspect the regulator is shorted. If you can work on the components you may be able to replace the bad ones and fix the dimmer. To find the short I would remove leads that go to ground and reconnect them one at a time to see which one is causing the trouble. If there is more than one lead going to ground. Quote Link to comment Share on other sites More sharing options...
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