subman Posted March 18, 2006 Share Posted March 18, 2006 The AWD recently quit working on my 92 legacy. It has a naturally aspirated 2.2 and a 4 spd. auto trans. The previous owner rigged a toggle switch to the FWD fuse under the hood. With the switch in one position the car is in front wheel drive and in the other position it is supposed to be in AWD. I removed the switch and set it back up to stock but the back wheels still dont turn and the FWD light stays on all the time. I don't think it's mechanical damage because it still rolls down the road fine and there is no grinding. Im curious how the transfer case ditermines when to switch in and out of 4 wheel, is there a module under the dash or in the computer, and is there an electric clutch in the transfer case? All the fuses seem to be ok. I;ve tried looking at wiring diagrams for the car but don't see anything about the AWD system. Any help would be apreciated because my car just isnt the same without 4 wheel drive. Link to comment Share on other sites More sharing options...
pliptheshevanel Posted March 19, 2006 Share Posted March 19, 2006 I'm assuming you already took the FWD fuse out by saying you set it back up to stock, correct? Link to comment Share on other sites More sharing options...
Aczwild Posted March 19, 2006 Share Posted March 19, 2006 When you removed the switch did you trace the wires back to their source? What the previous owner probably did was jump the wire leading to the FWD fuse holder with the switch, where if the switch was off, then it was in AWD and then if the switch was on there would be a current flowing through the fuse enabling the FWD. JDM'd All to hell Thanks Jimmy @ Hkc-Speed.com! RIP Coxx & Thanks Link to comment Share on other sites More sharing options...
subman Posted March 20, 2006 Author Share Posted March 20, 2006 I left the fuse in. Are you supposed to take the fuse out to have all wheel drive? Even if that's the case it dont work with the fuse in or out. Responding to the other message. The switch was wired just like you said between the FWD fuse holder and the plug that goes to the fuse. The wires and the switch seem OK. Link to comment Share on other sites More sharing options...
Aczwild Posted March 20, 2006 Share Posted March 20, 2006 I left the fuse in. Are you supposed to take the fuse out to have all wheel drive? Even if that's the case it dont work with the fuse in or out. Responding to the other message. The switch was wired just like you said between the FWD fuse holder and the plug that goes to the fuse. The wires and the switch seem OK. Reconnect the wires where the previous owner made the jump (if you havent already) and then I think you remove the fuse, so there is no connection. Check your manual for if the fuse is supposed to be in for FWD or out. The previous owner may have ruined the AWD system though by putting in the switch JDM'd All to hell Thanks Jimmy @ Hkc-Speed.com! RIP Coxx & Thanks Link to comment Share on other sites More sharing options...
pliptheshevanel Posted March 20, 2006 Share Posted March 20, 2006 The fuse is supposed to be out for AWD to work. By putting the fuse in, it completes the circuit necessary to make FWD work, which is supposed to be used only for emergency situations. That really sucks if your AWD system is ruined though ! Link to comment Share on other sites More sharing options...
SLegacy99 Posted March 21, 2006 Share Posted March 21, 2006 FWD mode doesnt save you gas anyway Link to comment Share on other sites More sharing options...
subman Posted March 22, 2006 Author Share Posted March 22, 2006 Thanks for the in put on the FWD fuse everyone. I never got a owners manual with the car so I didn't ever know how it's supposed to be set up, nor did I care, because it always worked great untill recently. I guess now I need to find out what exactly in the transfer case engages the rear drive shaft and if I'm getting power down there or not. My guess is there is an electric clutch in there of some kind. Does anyone know where to get a break-down of the transaxle so I can see what the hells in there? Link to comment Share on other sites More sharing options...
LongHiway Posted March 22, 2006 Share Posted March 22, 2006 Try the ultimate Suraru Message Board (w/ search on '92 or transfer case). There are folks there who have re-built cars several times. http://www.ultimatesubaru.net/forum/index.php Link to comment Share on other sites More sharing options...
47ka Posted March 23, 2006 Share Posted March 23, 2006 According to the 90 Legacy manual, you need to remove the fuse in the FWD connector to revert to 4WD. "For 4wd automatic transmission vehicles, place a spare fuse (15 A) in the FWD connector located in the engine compartment to open up (i.e. disengage) the 4WD circuit during front wheel maintenance requiring that the front wheels be turned (for example, when they are jacked up, driven on rollers, or tested by a brake tester). "Confirm that the front wheel drive warning light is on. Always use reliable blocks to prevent teh vehicle from moving. Never race the engine or brake suddenly." Hope that helps. Link to comment Share on other sites More sharing options...
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