more power window issues

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methos76
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Joined: Sat Mar 17, 2018 5:20 pm

more power window issues

Post by methos76 » Fri Oct 12, 2018 7:04 pm

I have a 66 t-bird and 3 out of the 4 windows work nonly when they want one doesn't at all, when I press the switch button I can see the interior light get dim then sometimes they work. at one time I had 3 working good, the next day none but when I push the switch the lights go a little dimmer. any ideas?

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RedBird64
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Location: Bothell Wa.

Re: more power window issues

Post by RedBird64 » Fri Oct 12, 2018 7:45 pm

In regards to the dead window, I would either jumper the switch or swap in another switch to see if it will work.

For the rest of the windows I would start with the safety relay and follow the voltage through the circuit. If you find your losing a substantial portion of the voltage, you'll then need to figure out what part is causing it.
If you can get the windows to work consistantly with the eng running, then your problem is voltage drop someplace.

On my own car, I found that there was a substantial voltage drop in the main +12V feed wire going to the switch cluster. All connections were clean so I reluctatnly added another, parallel wire to get the votlage up.


Scott
1964 Coupe Wimbledon white/Rangoon Red w/black int. Owned for 41 years. It was my folks car before that (not orig owners). VTCI # 12013.

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paulr
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Re: more power window issues

Post by paulr » Fri Oct 12, 2018 7:45 pm

Suffering from voltage drop. Could be a dying relay, corrosion at connectors. It’s a place to start. Got a multimeter?
Paul
VTCI 12014
Registry 45122
'64 Landau
"Beer, now there's a temporary solution!" ~Homer Simpson

methos76
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Re: more power window issues

Post by methos76 » Fri Oct 12, 2018 8:59 pm

thank you yes I have a volt meter not real experienced using one, its the motor in the passenger door that's bad, I have replacement. the relay mounted on the firewall looks new but I will have to check it out. just trying to get it ready for inspection. in the middle of some body work right now. I hate body work almost as much as electrical work. should have bought one that was already done, lol

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paulr
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Re: more power window issues

Post by paulr » Fri Oct 12, 2018 9:11 pm

methos76 wrote:
Fri Oct 12, 2018 8:59 pm
its the motor in the passenger door that's bad, I have replacement.
Too many times I've known/read stories of people starting out with motor replacement, only to find the problem persists. IMHO, the motor is the least likely guilty link in the chain most times. Of course, hang on to it; they're expensive. In my experience with Tbird power windows, whether or not the motor's good or bad, items that will affect performance exist in two areas:

1.) Electrical connections including firewall plugs. So many connectors where corrosion may creep in.
2.) Rubber, i.e., roof rails, bumpers (stops, whatever). Guaranteed to be shot if no one's ever replaced them, and essential to travel function.
should have bought one that was already done, lol
Uh, yeah. Tbirds all done with no issues. Like unicorns. (don't exist).
Paul
VTCI 12014
Registry 45122
'64 Landau
"Beer, now there's a temporary solution!" ~Homer Simpson

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RedBird64
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Location: Bothell Wa.

Re: more power window issues

Post by RedBird64 » Fri Oct 12, 2018 9:16 pm

Yes, the front motors rarely fail.
It's the back ones that are bathed in water every time it rains (unless the windows seals have been replaced). Mine were a solid block of indistiguishable rust.
1964 Coupe Wimbledon white/Rangoon Red w/black int. Owned for 41 years. It was my folks car before that (not orig owners). VTCI # 12013.

methos76
Posts: 60
Joined: Sat Mar 17, 2018 5:20 pm

Re: more power window issues

Post by methos76 » Fri Oct 12, 2018 10:31 pm

I did try jumping passenger window to see if it worked, it don't. I managed to get ahold of working replacement motors for all 4 but its only the one that's actually bad

Terry64HT
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Re: more power window issues

Post by Terry64HT » Sat Oct 13, 2018 9:35 am

Where did you apply the test power when you jumped the motor? In the door or at the switch?
Terry
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methos76
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Re: more power window issues

Post by methos76 » Sat Oct 13, 2018 11:08 am

both places, no response from motor

Terry64HT
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Re: more power window issues

Post by Terry64HT » Sat Oct 13, 2018 2:04 pm

One other thing to think about. The ground is part of the wiring harness and goes back to the dash (in the 64's, not sure about 66). If you only applied 12 volts to the yellow or red (I think the passenger side has a black stripe on each), the ground is still in the circuit. At the motor connector you need to ground the female.
Hope this helps
Terry
64HT

methos76
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Re: more power window issues

Post by methos76 » Mon Oct 15, 2018 8:20 pm

ok I was fooling around on the passenger side, lower panel was already off the dash on that side so I grabbed the harness that was showing and moved it around a bit and my rear windows are now working but neither of the front are. along with my back windows now working I also now have dash lights. so im guessing I have a problem in that harness or where it plugs together. is there any where else I should be looking?

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RedBird64
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Re: more power window issues

Post by RedBird64 » Mon Oct 15, 2018 8:55 pm

Well that's promising!
Have you checked the lock-out switch for the rears? I would also check every connection right upto the switch assembly. And look for any hacking or other obvious non-stock alterations. Many times those don't hold up to the test of time.
Nice that you don't have to spend big bucks on the rear motors though.

Scott
1964 Coupe Wimbledon white/Rangoon Red w/black int. Owned for 41 years. It was my folks car before that (not orig owners). VTCI # 12013.

methos76
Posts: 60
Joined: Sat Mar 17, 2018 5:20 pm

Re: more power window issues

Post by methos76 » Mon Oct 15, 2018 9:15 pm

I have a wiring diagram for the windows but I have no clue as to reading it. im use to black being ground and red power. this has a hole array of colors,
can I disconnect the lockout and the windows still work? I had already bought replacement window motors for all 4 windows but if I don't have to replace them that would be great

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