I drove the car a few weeks ago and the top retracted and went back up fine. Yesterday I drove it to work, with the top up, and after work the weather was nice and I tried to lower it. Didn't work. The windows lowered a few inches like they're supposed to and the locks in the rear unlocked, the engine revs dropped slightly for a second and that was all. Nothing. The display indicated that the top was not locked.

Pressing the raise button, the windows rolled up, I heard the locks close, and the display indicated that the top was up. Tried several times with no change. The rear deck lid did not raise, nothing.

Got home and check the main fuse for the roof, F15 in the engine compartment, it looked ok but I pulled and metered it. No problem, good fuse. I even swapped it with another 30A.

Got back in the car, tried to lower the top, same symptom. If it's a clue, I'd never noticed the engine revs drop before.

The trunks luggage panel was down as it should be. My simple OBDII scanner didn't show anything. Any other way to pull codes without a VIDA Dice?

Any ideas? I hate to think this has to go to the dealer for diagnosis as I want to sell this car but every time I get in there's something else wrong.


Thanks,

Erwin

Never say die. After confirming that 13V was getting to the pump motor I removed it from the pump assembly and found the shaft bearings/bushings had seized. Spraying with Tri-Flow got it to rotate by hand with some effort so I suspect either an internal brake or the bearings/bushings are bad.

Trying to find just the motor, not the entire motor & pump I've only turned up a source on Ebay shipping from China but the pics show that they don't have the two-wire feedback or tach pulse leads.

Anyone have one or know of another source?

I could try and grind off the crimps and repair the motor, I've done this with others, but would prefer a new or used one known to work.

Thanks,

Erwin in Memphis

This what you are looking for?

http://www.elvmotor.com/shopdvr/product/4/267337/Volvo_C70_Convertible_Hydraulic_Roof_Pump_motor_an.html

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Keeping it running is better than buying new

What's missing from the motor is the two-wire connector that gives the motor feedback to the controller. I've seen the one pictured on a couple of sites for around $60 for the motor only.

Here's the one I need, without the feedback tach pulses the controller will throw a "No Signal From Motor" code.

https://www.ebay.com/itm/133786508222?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

Good news is I did rebuild my motor and have it working on the bench with a 12V battery. This week I'll attach it to the pump to see if the pump works.

There are no bearings, only a fixed bush on the connector end and a self-centering bush on the pump end. I took it completely apart, polished the bushings, cleaned out the corrosion and freed one of the brushes.

The end cap is staked on so i used a milling bit in the dremel to cut those back and pop off the cap, circuit board, brushes, etc. I don't want to hammer on the case to stake the cap back on so JB Weld around the edges will have to do.

One of the brushes has a crack, so after I confirm the pump works, I'll order the proper motor from the link above. I don't want a cracked brush to cause a fail while operating the top down the road.

Thanks.

Epilogue,

No joy. The motor works but now when trying to lower the top, the windows don't lower part-way as they did before and I get a "Top Failure, Maintenance Required."
Checked the 30A fuse, checked the wiring on the motor.

Add to this, a tree over our driveway dropped a branch which went through the windshield. That's it. I'll have the windshield replaced and sell the car as-is. A 2-door coupe. Time to cut losses and move on. Registration is due and we're paying insurance. Not spending another dime on it.

Erwin
Memphis

'88 745T $
'92 945T $
'95 855T $$
'07 C70 $$$$$$$$
'08 V70 $$

Agree. A car needs to be practical or a joy to drive. When the joy goes away, the car should also.

My 1974 VW convertible was so much fun to drive, but after the third engine it was time. At least the top always went up and down :)

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Keeping it running is better than buying new

read this:
https://volvoforums.com/forum/volvo-c70-14/c70-hardtop-roof-93017/

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Keeping it running is better than buying new

Klaus,

Thanks. Independent shop my son works at finally got the car in and scanned it. Code is C053, "Hydraulic Pump Signal Missing." They're not equipped to go chasing wiring harnesses or connectors so recommended a local body shop or the dealer. Ouch.

The other recommendation, in today's crazy used-car market, is sell as-is. As long as the AC works (Memphis) and the car looks and runs well, it will sell. Blue Book value is out the window these days. Thing is, I'd probably come out even if I had it repaired then sold it as opposed to just selling it.

In the meantime, I'm looking up the C053 code and seeing if there's anything I can try myself before listing it.

The top worked fine, then we had a week of snow and it sat parked. After the thaw the top wouldn't work. I'd wonder if a weak battery would cause this but it fires right up and I've driven it on my commute.

Erwin
Memphis
'88 745T $
'92 945T $
'95 855T $$
'07 C70 $$$$$
'08 V70 $

This is a decent video. I like how the cap comes off to expose the 20ga wires.

https://www.youtube.com/watch?v=Od6v-X-cEDg

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Keeping it running is better than buying new

Klaus,

I saw that last week and will be bringing the car home to have a go at it myself. I had no idea where the pump was and there has been water in the trunk due to blocked drains around the base of the rear section of the top (under the window and the drains in the body it feeds).

So I suspect that the motor is bad and will confirm once I get down that far. One obstacle, I won't fit in the trunk like Klaus in the video. And by the way, that wouldn't be you, would it?

I've found the motor on Ebay for around $60 and the entire motor/pump, new, for around $1,500 if I need to go that far. A used motor/pump goes for around $300.

Fingers crossed. I get the top and the passenger door handle working and I'll be very happy.

Erwin
Memphis,

Maintenance:
'88 745T $
'92 945T $
'95 855T $$
'07 C70 $$$$$
'08 V70 $ (so far, wife reports a CEL now)

Sounds like one of the servo motors bit the dust. You will need a good scan for the top to tell you what's wrong. Bummer...
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Keeping it running is better than buying new

It's at a local independent (all brand) shop. I know the owner and they do work on Volvo and believe their Autel scanners might go deep enough to determine the problem.

Thanks Klaus,

Erwin
Memphis

'88 745T $
'92 945T $
'95 855T $$
'07 C70 $$$$$$$
'08 V70 $$

LOL