Q45 Lil Problems

[CastorTroy777]

Hey.

I have a 91 Q45 and my power driver seat is not working at all, also the display on the thermostat controls do not light up. which is no big deal but is a bit annoying when your not fimilliar with the car yet, and i have no way of knowing how to turn on the Air conditioning. I have checked all the fuses and the heater works fine. just dont know what im doing, lol.

Any ideas on fixing the seat or checking if the seat motor is just dead?

And the display would just be a bonus!

Thanks,Ron

[DAEDALUS]

You were correct. Dees did not fix his controller. However, he did find the excerpt from the old site. Here is what Dees posted in the Infiniti General section written by Lon Allen:****************************************************Here is Lon's experience...

Decided to attempt to discover the notorious A/C readout failure this Saturday. Disassembled the A/C control box. Tried as many things as I could to no avail. Finally I remembered that one of the posters on this board was able to get the readout to work if he flexed one of the boards. Seeing that the board that has the readout mounted on it does not have that many components on it I decided to try and do some flexing on the main board (the one that plugs into the harness in the dash). Lo-and-behold, if I flexed the board in a certain way while it was attached to the dash harness the readout would start working. I narrowed it down to a one centimeter area on the board that I could put my finger on and push and the readout would come to life. Back at my soldering station I resoldered two different resistors and that was the fix. Hasn't stopped working since. Replaced all the lights and it works like new. Replaced the bulb in the power window cut-off switch as well (that was a task in itself). Had to take the switch apart (snaps together). The bulb in the switch is the same as the A/C backlight bulbs (radio shack $1.49 for a 2-pack). The bulb itself is mounted in a rubber holder that sits on top of two wide pins. The bulb leads are threaded through the holder in such a way that when it is pushed back on the pins the leads come in contact with the pins. One thing I noticed that might be the root of many of the A/C readout problems is that the capacitors on the main board are all leaking electrolytic acid just like the ones on the speaker amps. These caps are from the same manufacturer (nichecon) and are of the same family of caps based on the color of the cap wrapper (brown). When I ordered caps to attempt to replace the ones on my speaker amps the manufacturer representative sent me black caps as the replacement. Apparently the brown ones were prone to failure and this is evident on the A/C readout controller as well as the speaker amps. I cleaned all the dried/hardened electrolytic seepage off of the few caps that there are hoping that this might get the readout working (that was the first thing I tried). I did not have two of the caps in my current supply, so I wasn't going to go through the trouble of just changing one to attempt to fix it. The plan was to order the caps and try the fix at a later date. The test of flexing the board was a last minute test before buttoning it up.

If the caps are the real problem and the solder joints on the resistors are only secondary I will most likely have to revisit this issue at a later date. At least now if it is the caps I have a game plan to fix that when the time comes. I can't see the solder joint thing being a wide spread issue that would effect so many of these readouts, but if there were an issue in the manufacturing process (where a wave soldering device was not applying enough solder or a brittle solder at that) then maybe the whole problem is the solder joints and the caps are only a secondary issue. Time will tell.

Lon Allen - 92 Q45t with a working A/C readout

Thanks to Deesolballs for saving this bit of information. Hopefully we can sort through all the old board posts someday and create an index of help tips. If anyone is interested, I would be willing to help transcribe and sort.

firedaneMedina, Ohio

Do a search for "dis*play" without the asterisk in IOM to get good info.

Not sure about the seat, could be a broken harness going to the switches, or a broken switch. A multimeter will confirm if the switch is "hot". Does the seat switch bulb light up at least?

[CastorTroy777]

Wow!

Thats a wicked post, Thanks for finding it for me. where is the seat switch bulb? I have no idea what or where it is? But i do have a multimeter and a soldering iron to fix that readout. Thank god! Gonna be sweet!

Thanks again,Ronnie

[DAEDALUS]

There should be a couple little bulbs right next to the switch for memory positoin. I thought the '91s still had them, though I could be wrong. They may not be a good indicator of the switch harness operation actually, since they're probably separate circuits.

[CastorTroy777]

Strange thing happened today, went out to look at the bulbs found them, pushed the seat button and the mofo works now! Sweet! donno if it will last but its a releif because i was driving too far back, could barely reach the pedals. lol

[CastorTroy777]

Back to the same problem again, my seat only works when u get in and out and take the key out of the ignition, but other then that i can't adjust it after i get in.

Also i noticed today that i got in and turned in the car and the computer display was working, it worked for a while then i got curious and started banging around lightly around the display, i hit the dash directly above it and it shut off quicky and hasn't came back on since.

Loose connection or ground?

And theres one other thing, i noticed that no interior lights are working(map lights...etc..) I think they worked at one time, i remember them being on and never paid nomore attention to it.

[CastorTroy777]

Hey all,

I found a 92 Q45 in the scrap yard in so so condition. Just wondering what parts i should swap over to mine to try to make the drivers seat work, i know my motor is good it works great, so what else is there to try besides the panel in the drivers door?