ScottDWAH

1990 Maserati TC Soft top HELP

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The electric pull-down for my Maserati TC convertible top is frustrating me. With no warning the rear pins now do not latch when the back of the top is pushed down. Playing with it for a while and using the manual release in the trunk will get it to catch every now and then. Although the electric motor does work it won't pull down as needed and i have to lock it down manually. Sometimes it works, sometimes it doesn't.

I've check the factory manual which is no help at all. I'm not sure how to adjust it if that's even possible and am afraid that if i keep playing with it i'll burn out the motor.

Any help from someone that might be familiar with this challenge would be appreciated.

Scott Harris

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I had a similar problem. What was happening was when the top switch was pressed, it operated the release but did not reset the mechanism. There should be a 'clunk' after the top lifts and the pins release. It is the same sound as when you manually release. My solution was to squirt some WD40 onto the the mechanism through the hole in the trunk. Seems to have done the trick. I would first manually reset the mechanism as per the book, lubricate and try again.

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I doubt you have an electrical problem, just a mechanical one. The entire mechanism can be adjusted up or down by the main bar that holds it all in. If the mechanism has moved downward then adjusting it up may let the pins catch again. There is a procedure in the owners manual for resetting the release with the button, I don't have a manual anymore but someone else will have one. The highest probability is that the motor casing (clear plastic part that holds the gears) is cracking or that the gears are disintegrating.

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Colin,

I'll give it a try.

THANKS,

Scott

I had the same problem and the WD-40 trick worked for me. Also, make sure that the pins fully lock, or the motor will still draw current and kill your battery.

In fact, my rag top still is hard to pull down and gives me the current problem, but the hard top doesn't.

John

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Tip:

When locking down the convertable top do the rear lockdown first. Then lock the windshield latches

roger

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C, when you say that your pull down does not work, what exactly do you mean. Is it not latching properly or is the motor not running? It is difficult to comment if we do not know the exact problem you are referring to. Let us know and we may be of some help.

Bob

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the issue I'm having with mine is the soft top will not lock into place. It appears to lock but then at the slightest jar, sometimes even when locking the windshield latches it will pop open in the rear? Any ideas?

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Thanks for any advise. 

I have done many test and manual operation. By operating the top at least 50 times. It has drawn once by pushing the top button. 

I started by opening the top switch. (No power)

Then removing the rear assembly. (Tested for continuity, through out all wiring; and motor operation, gears good)

Reinstalled. 

Heavy lubrication on all moving parts. 

Cleaned all green off any contacts. 

Got power once. Arc the top switch, it operated, once.

Opened up the metal box with switch/ points/ transistors and ic chip. I soft cleaned it. Appeared to maybe have had water in it. Car has 35,000 miles. 

Purchased a relay, it is a GM part. 100266 something. 

After driving a bit crazy after the $50 part. Wondered why is there no power at the top switch. I opened the tonneau switch. Wire broken clean off. Solder it; yea now I got it. Nope. 

Visors down, park level, set parking brake, released handles from header. Put windows down, turned engine off. Nothing, HELP PLEASE. 

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OK, it sounds like you've done a bit of work, but:

Do you have power at the appropriate fuse?

Do you have power at the switch?

If no, or intermittent, then you need to start tracing the wire and find the spot where there's bad connection/broken.

Do you have good ground?

If no, make sure that wiring/physical connection to the chassis is good.

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