? on possible tranny issue

[cage47]

I've been having a heavy draw issue for the past few months in my 95 GA gt. One thing just came to mind. Back in October the ctys fuse blew. When it did this the tranny would not shift. I replaced the fuse and since then the draw seems to be worse. What does this ctys fuse go to.

Also which relay in the engine compartment works the A/C. I'd like to see if that is the cause of my lost a/c since Jan. Since the charge is still good.

One other thing, could a coil pack getting ready to die cause the battery draw?

[Matt95GT]

The CTSY fuse is mostly interior accessories... power locks, cig lighter socket, etc. Most common cause of it blowing is coins or other stuff falling into the lighter socket. It shouldn't be related to engine or trans issues though.

The A/C will not engage if the PCM determines the pressure is too low/high. I doubt it is simply the relay.

[cage47]

Well it seems funny how I drove to my daughter's choir recital and the car wouldn't shift normal. Manual shift would go but not if I left it in D. When I looked the ctys fuse was blown. When I replaced it, shifting like normal.

It may be the case with the a/c. But the charge is good. But still which relay is it? That's all I asked.

[Matt95GT]

It's in the bank on the passenger side firewall, upper corner... but even the factory service manual doesn't ID which in the bank it is, since this varies. I wouldn't manually jump it though... if the refrigerant did leak out running the compressor will destroy it.

[cage47]

Yes it is the bank on the firewall. I had a diagram for the old 90 I had but nothing on the 95. I don't plan on manually jumping it. I want to try a replacement relay. No the coolant didn't leak. I've already tested it and it's still full charge. It just stopped working last Dec. But I'm really interrested in the ctys and shifting.

[rixGAphx]

Originally posted by cage47
I've been having a heavy draw issue for the past few monthsPlease describe the 'heavy draw' issue in-depth.

Specifically, is it killing your battery, or dimming your lights?

What other symptoms indicate heavy draw?

I replaced the fuse and since then the draw seems to be worse.If the fuse still blows, then there's a short circuit that needs to be fixed.
If it doesn't blow, then the current running thru the system isn't 'excessive'.

BUT, one of the light bulbs (like glovebox or trunk) might remain 'on' 24/7, thereby killing a battery if the car is parked for about 3 days.

Unless there's something else happening you haven't mentioned.
One other thing, could a coil pack getting ready to die cause the battery draw? No.

Though I don't yet know about the 'battery draw', I will say that power only goes to the ignition module (and thus the coils) thru the keyed ignition switch.
So basically, anytime the coil is getting/using power, the alternator is charging the battery and powering the car.
No 'battery draw' problem can be associated with the ignition coils (or any other 'keyed' circuit, for that matter).

The Courtesy Lamp circuit (CRTSY) is un-keyed, always 'hot'.
So it is a prime candidate for something that draws-down the battery overnight.
Short-circuits, like a bare wire, almost always blow the fuse.
More likely, it is a light bulb or some other low-wattage device that is continually sucking a little bit of power.
* * *

The tranny receives all its electronic commands from the PCM, the computer.
* If the PCM isn't working, you're walking since the engine won't run; so that wasn't the source of the no-shift.
* I *think* the PCM commands go thru relays, which on the '95 *might* interface with the CRTSY circuit. If the CRTSY fuse blews, then the solenoid for 1 st gear might not have engaged. I dunno.
That doesn't explain why the tranny worked manually.
* * *

Pull the CRTSY fuse and go for a test drive to see if the tranny repeats the no-shift behavior:
* If so, then you weren't imaging things; mystery solved.
* If it doesn't repeat, then it will become one of the (millions of) Delco mysteries.

Get a multimeter, remove the key, and disconnect the cable from the NEG battery terminal.
Measure the current (in amps) across the cable-to-terminal.

Should only be about 2 amps (being 24 Watts) for the computer and clock in standby mode.
Mebbe another couple amps for an alarm.

If it's more, then remove the CRTSY fuse again, and remeasure the current.
How many amps were disconnected by removing the CRTSY fuse?
If a bunch, then you need to investigate further to isolate what's sucking the power.

And don't forget to check/clean/replace the battery cables.
They are a biotch on this car.
I think I've written about them a couple times, so mebbe do a 'search' under my user name; no, wait, that'll take all day :roll:
* * *

Sorry, I don't know which relay does what.
I think I would first remove/reinstall the AC fuse (30A?), then start removing/replacing the relays to see which one controls what:
* AC
* Headlighting
* Horn
* Fuel pump (though I *think* this is in the rear near the tank).
Sorry, I dunno the circuiting on the '95 very well, and Haynes wiring diagrams are either useless or dangerous.

Hope this helps,
-Rick