You may remember that we bought Mom an '85 240, with auto trans and OD. It works fine and shifts great (and is getting over 22 mpg), but the OD lamp on the dash works backwards: OD on - Lamp on OD off - Lamp off The first guesses when I posted this originally was that it had the incorrect relay. I hit the Pick 'n Pull and got another relay from another auto trans, and it matched the numbers in the Vadis. I resoldered the board on the replacement in preparation for R+R. Yesterday I finally got the chance to get into the car and the relay that was in there was the same white one (the relay for the stick is red, auto is white, and it had the proper white one). I switched it anyway, but no change. So I dug into the wiring diagram in depth and here's my theory: One side of the indicator lamp is fed +12v. from the fuse box to the instrument cluster when the ignition is on. The other side of the lamp goes to 87a on the OD relay. This connects internally to terminal 87 which leads to the OD solenoid on the tranny. NORMAL OPERATION: When the OD is off, the 12 volt feed from the cluster goes through the lamp, to Relay terminal 87a, out through OD relay terminal 87, and grounds through the OD solenoid's windings. There is nowhere near enough current to activate the solenoid so the lamp is illuminated telling the driver that OD is off. When the OD is on, the relay is energized and 12 volts is fed to the solenoid from terminal 15 on the OD relay, out through OD relay terminal 87. Now +12 volts is being supplied at both sides of the indicator lamp and so it is off now. So it seems that there is a problem with the wiring in or to the instrument cluster that is not supplying voltage to the indicator lamp when the OD is off causing it to only illuminate when the OD is on. So before I go chasing this.... Comments...? __ __ Randy & \ \/ /alerie's \__/olvos '90 245 Estate - '93 965 Estate "Shelby" & "Kate"
Hi, We have an 850 and a 2000 V70. The lamps on the dash for the cruise control works just as your OD lamp works, namely cruise on - lamp on, cruise off - lamp off. Maybe that is the way you OD lamp should be and it is working correctly. We had an 82 245 with OD and I think it worked the same way, but I can not remember for sure. Good luck, Brad
Not at all. The lamp on the dash says "OD off" (or words to that effect). The manual states, "As a reminder, when 4th gear [which is the OD] is disengaged, the indicator light in the instrument panel is illuminated." So when the lamp is illuminated the OD is supposed to be off. For most driving situations you never turn off the OD on the 240s, at least with the automatics: from the manual: --------------------- Disengage 4th gear (reminder light illuminated) when: * towing a trailer * driving on hilly roads where precise speed control is desired. ---------------------- .. IPD even sells a plate that you use to permanently disable the OD since it can be expensive to repair when it does go out. __ __ Randy & \ \/ /alerie's \__/olvos '90 245 Estate - '93 965 Estate "Shelby" & "Kate"
I would start by pulling the relay and measuring between the chassis ground and 87a on the relay, or just ground 87a and see if the light illuminates. That will tell you if things are ok on the cluster side. It's worth checking the ground strap between the valve cover and firewall too, flaky ground there can cause all sorts of bizarre problems. The fuse box is a prime suspect as well, corroded fuse contacts are a classic source of 240 gremlins.
Thank you, James. Will do that and report back as soon as I get a chance to get my hands on the car again. __ __ Randy & \ \/ /alerie's \__/olvos '90 245 Estate - '93 965 Estate "Shelby" & "Kate"
