93legacytouringturbo Posted July 30, 2009 Share Posted July 30, 2009 I NEED SOME HELP.I bought a 2004 legacy sedan a few mos ago.Subaru dealer told me inhibiter switch is the reverse/backup light switch...$80 for the switch,my mechanic(very good independent mechanic) put it in,checked fuse,replaced bulbs....still no backup lights.We are stumped and need your help.Thanks Link to comment Share on other sites More sharing options...
Fairtax4me Posted July 30, 2009 Share Posted July 30, 2009 (edited) I read wrong earlier and didn't see that you had already installed a new switch. You probably have a wiring problem of some sort if a new switch didn't help. I don't know if there is a relay involved in the reverse light circuit on that car. If there is then it could be bad. Edited July 31, 2009 by Fairtax4me Link to comment Share on other sites More sharing options...
OB99W Posted July 31, 2009 Share Posted July 31, 2009 Looking at a 2004 factory wiring diagram, things are a little confusing. It shows three different versions -- manual trans, and both 4-speed and 5-speed auto. I had thought that the 5-speed auto wasn't yet available on the 2004. The 5-speed uses a relay to switch the back-up lights. I'm going to assume that you have a 4EAT, and my following suggestions are based on wiring for that. When in reverse, is 12 volts at the back-up lamp sockets (brown/yellow wires)? If so, check socket ground connection (black). If not, check that 12 volts is getting to inhibitor switch (pin #1, red/white wire of 12-pin connector T7). If 12 volts isn't at the inhibitor switch, check connection at other end of red/white wire (pin #9 of 12-pin connector T3 which mates with B12) near front of trans, becoming green/blue wire. If the problem doesn't get resolved with that info, let us know what you find -- I can post some more details based on what you report back. Link to comment Share on other sites More sharing options...
fredsub Posted November 22, 2009 Share Posted November 22, 2009 I have this prob on 98 OBW. confirmed the reverse switch on the MT is functioning by accessing the connector in the engine bay. Applying 12V with a wire to the white/red wire has the back-up/reverse lights alight. Checked every fuse in the side panel - all ok. the wire diagram doesn't show a relay....but somewhere the brown/yellow (in the engine bay) must convert to the white/red under the dash (and to the rear)........... f*****in wiring!! how much needs to be pulled apart? Link to comment Share on other sites More sharing options...
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