Question about Malibu ML88TL 88Watt Low Voltage Power Pack with Timer

1 Answer

Hi ... I have three Malibu timers ,one is ML 88T the others are ML44 T The first one I connected did not work ML44T , I check the stopers,The light bulbs the cord the outlet ,nothing. I did worked. I did the same steps to the ML88T. . So I have ML44T not working and ML88T. When I plug them into a outlet I hear a hum ,I turn the dial on the settings, check the stopers ,I make sure the wires are connected correctley. I don"t know what else to do.

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You did not say if these power packs are new or if they stopped working.
The humming sound says transformer is working, but terminals have to test 12Volts DC.
If power packs are older and were left plugged in when bulbs were not working, then power packs can go bad.
There are no replacement parts for power packs except trippers.

Open following page for power pack troubleshoot plus links and information:

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Posted on Mar 24, 2011


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1 Answer

Why won't my ml44t transformer turn the connected lights on or off?

1) Copy following link for installing and troubleshooting power pack

2) Test outlet for power.
Temporarily run extension cord from another outlet.
Connect wires to terminals a and b ... make sure no insulation is under screw plate.
44 watt power pack will operate 44 watts of low-voltage lights (12Volt).
If 300 watts of lights are installed on line, then lights probably will not light up.

Mar 01, 2013 | Hardware & Accessories

1 Answer

Where can I order some replacement ML Power Pack trippers for a ML600TW and ML 300RTW timer?

1) Copy following link for ML series trippers, troubleshoot, 5-year warranty info, and tips to keep power pack running longer.

2) Add comment if more help is needed. Jan 2013.

Jan 18, 2013 | Intermatic Inc. ML121RT Malibu Low Voltage...

1 Answer

I have a malibu ML 88T low voltage transformer. It was working fine and I saw the manual on/off and turned it, (i should have left it alone). The lights did not come on, so I turned the manual on/off...

You can do it yourself.
Anybody that knows 'hardwired' and observed timer is making humming sound can wire up a timer.
If M88T timer dial is not rotating, but power pack is making humming sound, then that says timer is receiving power but clock motor has gone bad.
There are no replacement clock motors for power packs.

To wire a new timer:
Click circuit breakers until the humming sound turns off.
Turn breaker back on to confirm that humming sound is associated with that breaker.
Buy a tester at local hardware and ask them how to use it.
Tester will give you assurance that power is off when connecting new timer.

Outdoors: put down dry boards to stand on, never stand on bare soil or wet/damp surface, don't touch anything metal and don't hold metal screwdriver in mouth while working on electric circuit. Wear gloves if you want. And don't sweat.
With 120volt circuit, as long as you are not grounded, which means that you are not touching soil, or anything that grounds back to soil, then you will not get electrocuted. You can get shocked only if power is still turned on at circuit breaker, and it will be surprising, but it won't kill you as long as you're not grounded. All electricity goes back into the earth to complete circuit.

Open the box where timer is hardwired.
Use tester on black wire. To confirm power is off.
Typical 120volt circuit: Black wire is Hot and carries voltage. White wire is neutral and completes the circuit back to ground. Bare copper wire is ground and serves as redundant safety.

Old 88T timer will be wired black-to-black, white-to-white, and green-to-bare copper.
Take photo of wiring to avoid confusion. Post photo on flickr and add a comment with link to photo for another pair of eyes on situation.
Cut off end of new timer wire, strip insulation with knife and attach wires same way previous timer was connected.

To install ordinary 120Volt outlet so timer can plug in: Buy outlet from hardware: Black hot wire connects to brass-colored screw, white neutral wire connects to silver-colored screw, bare ground wire connects to green-colored screw.

Open following link to see basic circuits:

Aug 08, 2011 | Intermatic 24hr Outdoor Timer

1 Answer

My ml600tw timer stopped working. How do you replace the timer? I took screw out by timer but I cant pull timer out. Is it held in another way?

You posted under Intermatic/Malibu ML series power pack.
There are no replacement clock mechanisms or timer modules for ML series power packs.
If you found a replacement clock motor source, add a comment add a comment here so others can benefit. If you find a way to repair clock motor, also add a comment.
Many people have same problem and will benefit from your discovery.
To work around problem, buy cheap plug-in timer, set power pack to override, and then plug power pack into cheap timer.
ML series has 5 year limited warranty.

Open following links for troubleshooting resources, warranty links, manual links and Intermatic parts:

Apr 19, 2011 | Malibu ML600TW - Low Voltage Power Pack -...

1 Answer

I have a ML44T automatic timer for my outdoor lights which has been working perfectly until now. When the time turns until it gets to the point where it has to trip the switch to turn the lights on it...

The clock motor has gone bad.
There are no replacement clock motors.
To work around, buy cheap plug-in timer, set power pack to override and plug power pack into cheap timer.
Power packs have 5 year limited warranty.

For more information on Intermatic/Malibu power packs showing troubleshoot steps, replacement trippers, useful links, warranties and tips:

Mar 08, 2011 | Intermatic ML44T TRANSFRMR WITH TIMER 44...

1 Answer

Timer on malibu transformer ML-44T is turning in reverse for no reason

There are no repair parts for power packs, but they do come with 5 year limited warranty.

Contact Intermatic:

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you via e-mail while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Feb 20, 2011 | Intermatic ML44T TRANSFRMR WITH TIMER 44...

1 Answer

I have a Model ml 44t, when the temp outside became cooler my timer would not turn on the lights, it would stop rotating at the red post.

-I think your outdoor plug is connected to GFI plug in bathroom or kitchen >>> check reset on GFI.
-Next, plug your hair dryer into same outdoor plug to see if plug has electricity >>> electrical plugs outside wear out quicker, and get loose wires.
-Move timer cord to the other plug
-I don't know if a bit of WD 40 would help or not .... couldn't hurt to spry some on the pins at this point ...UNPLUG timer because WD is very flammable...
-Tips from manual mention checking for burned out bulbs ... I've seen that mentioned other places and don't know if bulb problems shorten life of low-volt transformer inside the box.
-I worked with timers for years, and never seen replacement clocks or transformers for Malibu-type timers
-Timers located outside get damp and dirty ... these things cause small gears inside timers to oxidize and clog so they don't work after a while ... again, a bit of WD-40 might help

Tips copied from manual:
• Make sure power pack is plugged in. Is outlet working?
• Turn manual ON/OFF switch to "ON" or rotate dial so "ON" tripper passes time line indicator.
• Is lamp burned out? Use another lamp to test.
NOTE: This lighting system is designed to last many years under normal conditions. However, lamps eventually burn out and operating with one lamp out can shorten the life of the others. IT IS IMPORTANT TO REPLACE BURNED OUT LAMPS PROMPTLY.
Conditions beyond your control such as abnormally high household voltage due to poor utility voltage regulation will also affect lamp life.

The timer has 1 year warranty.

Oct 04, 2010 | Malibu ML88TL 88Watt Low Voltage Power...

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