4ACT diagnotics link

Tapani · #1 05-02-2014, 07:13 AM

Something I stumbled on:

http://www.sonnax.com/articles/169-S...et-of-Problems

/T

blackbolt94red · #2 05-05-2014, 11:30 AM

this question might be related...why would anyone remove the rear half of the drive shaft and pull the fuse? Wouldn't the FWD dash light come on? Would you do this to mask a transmission fault? Until I pull the dash to see about the light...
I suspect fraud on the part of an owner of a car and he is claiming ignorance.
bruce

Chucksta · #3 05-05-2014, 10:59 PM

Hmm... Multi faceted question..

Well.. you would pull the back of the drive shaft if the system was malfunctioning. Whatever the transmission did wrong wouldn't necessarily be felt, if it wasn't connected to anything.. Probably would have accomplished the same thing to put a fuse IN the FWD spot..First SVX I ever drove was terminally ill. If you stomped it hard enough to pull the front wheels lose, there was a nice "bang" from under the car as the transfer clutch took another step towards being scrap metal. The owner put in the fuse and drove another 18 months before selling it to a vanagon conversion company.

Which brings me to the next point..

You don't "pull the fuse"..,. There's no fuse meant to be in the holder... You put one in to make it front wheel drive only, or, for "test purposes".. Putting a fuse in the holder is what makes the "FWD" light on the dash come on.. It doesn't activate the AWD... It DE-activates the pressure circuit in the transfer case that engages the AWD.. USDM is 90% FWD up to 50% / 50% split.. With the fuse in... the rear of the drive train is just along for the ride..

The previous owner may well have bought it like that .. and never even noticed..Especially if it wasn't snow driven.. No fuse = no light on dash..

blackbolt94red · #4 05-06-2014, 03:08 PM

Thank you very much, that makes things a little clearer.
My mind was going in circles but you helped. I was stuck on fuse in = AWD engaged, not vis/versa. Still don't know why the drive shaft was gone, the seller won't say....
I'm putting one in this week. Time will tell. Again, thanks for the quick response.
I had a '94 for 17 years and really never had an issue anywhere. Missed it so much, I thought I'd dive in again. I should have checked the depth a little more, no?
bruce