1990 Grand Marquis No Turn Signals and A/C is warm

[I Like FE]

Yesterday afternoon I realize I did not have turn signal indicators, but do have Emergency Flashers. Relplaced the flasher in the fuse box this morning. No change. Cannot find a fuse box diagram. Did find a 15 amp fuse blown (fuse 5) replaced it. No change. I do have lights. The wipers work, the high beam works. Not sure where else to look without a manual.

The A/C his not cooling much. The clutch does not stay energized for very long, seems less than 30 seconds then cycles. I can jumper the clutch to stay on. It does cool down some but Normal is coller than Max? Any ideas?

Your help is apprecieated.

[87gtVIC]

If the clutch does not engage longer then what you are experiencing you are low on refrigerant.

[Dereck]

Hi I like FE

Fuse 5 is for the turn signals it also does the A/C are you sure that fuse was blown or didn't blow again ?



Regards

Dereck

[gadget73]

If the clutch is cycling quickly, it sounds like the system is low on refrigerant. Don't jump the pressure switch to force it to run if thats the case.

[I Like FE]

This morning I checked fuse 5, It is still good. Now what I need to do is check at the switch for voltage. Not sure where the wiring goes. Any one have a wiring diaghram?

Dereck thanks for the fuse panel lay out.

Gadget, I tried to add R134a a couple of weeks ago. It did nit seem to take any.

Thank for your help.

[I Like FE]

FIXED Turn Signals

A couple of minutes ago I realized that I changed to flasher and reinstalled the original flasher before I found the fuse was bad. I took the original flasher back out and replaced it with the second flasher.

I now works.


Thanks for all you help.

Now to get the A/C to cool more than about 5 degrees below incoming air temp.

[86VickyLX]

Recharge the system. Still have R12 in it?

[I Like FE]

R 134

I had it converted to R134 2 years ago, a few months after I got it.

About 6 weeks later it quit, I took it back and they replaced the pressure switch. Charged me parts only.

[86VickyLX]

I had it converted to R134 2 years ago, a few months after I got it.

About 6 weeks later it quit, I took it back and they replaced the pressure switch. Charged me parts only.

6 weeks, yeah, it's leaking. Check around the compressor clutch, if you see any dampness, that's probably where your problem is. Have a shop hook up a sniffer or put some leak detector in there to find where the stuff is leaking.

[1987cp]

Do shops working on A/C systems not verify whether they're leaking before charging them? Oh wait, I know they don't, because the shop that once let $120 worth of freon leak out of a vehicle of mine said I'd have to pay them to pressure check it instead of just randomly replacing the O rings like they'd done in the first place.


As for the turn signals, I had some quit working a year ago for a really dumb reason - the blinker connectors inside the fuse panel had gotten loose! I ran the blinker jerryrigged for a year out of laziness, then when I felt like it I pulled the connectors out and bent the springy contact bits back tight. Hooked everything up like stock again and it works fine.

Still probably want to make sure the multifunction switch is good, though.

[86VickyLX]

Do shops working on A/C systems not verify whether they're leaking before charging them? Oh wait, I know they don't, because the shop that once let $120 worth of freon leak out of a vehicle of mine said I'd have to pay them to pressure check it instead of just randomly replacing the O rings like they'd done in the first place.


As for the turn signals, I had some quit working a year ago for a really dumb reason - the blinker connectors inside the fuse panel had gotten loose! I ran the blinker jerryrigged for a year out of laziness, then when I felt like it I pulled the connectors out and bent the springy contact bits back tight. Hooked everything up like stock again and it works fine.

Still probably want to make sure the multifunction switch is good, though.

He fixed the turn signals. The flasher blew the fuse.

[1987cp]

Oops, blame the supershort monitor on the Dell Mini. Still, who knows who else'll have the silly terminals get wonky.