Question about Malibu ML600TW - Low Voltage Power Pack - 600 Watt - With Timer and Ground

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One connection works and the other does not. Does

I have two connections for my landscaping lights. One connection works and the other does not. Does this mean that the transformer is damaged? Is it ok if I connect all the lights to the one working connection? I basically have 20 lights at 10W each for a total of 200W. However, when I connected them all together, they did not light. Also, I have 3 connection ports labled A, B, & C, do I connect the wires to A&B, or A&C, or B&C. I currently connect the wires to A&B, but it does not work. Thank you.

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Open following for Power Pack troubleshoot checklist and warranty information and other tips to keep power pack working longer:

If terminals are not working, test for 12 volts across A and B terminals.
Terminal C is used ONLY when you use photo-eye that is made specifically for the ML series power pack.

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Posted on May 27, 2011


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We have a Malibu 300 low wattage transformer for 13- 20 watt landscape lights.

Try connecting a lamp (correct voltage, etc) directly to the transformer. Most likely, the wire from the transformer to your lights is broken... The reset button can't reset anything, if there's nothing wrong there.

Jun 16, 2016 | Intermatic Malibu 300W Power Pack...

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I have 3 landscape lights that were working but quit working in a system with about a dozen other lights that continue to work. I presumed the bulbs needed replacement but that didn't help. I verified...

My experience has shown that this is nearly always a connection and/or wire corrosion issue. Be certain that all connections are clean-if not clean with fine grit sandpaper or replace. Remember these devices are exposed to the weather on a continuous basis.

Nov 04, 2013 | Intermatic Malibu 300W Power Pack...

1 Answer

My circuit has separate transformer, can I use r115s? Are there modifications that need to be made?

Likely it will damage it; the Remcon/Amprobe will work with the existing switches; just don't connect any wires from the external transformer

Feb 07, 2012 | Amprobe R-115S Remcon Relay Switch

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Can you use 120 volt photo control switch in a 12 volt application?

No, but you can connect a 120 volt photo control to control the 120 volt receptacle_outlet_ that the transformer plugs into, though. Or, you can purchase a 12 volt photo control to control selected lights (or all) on the load side of the transformer. I have seen the 12 volt photo controls that can be used for this purpose at Home Depot in the landscape lighting section. You may want to call them first to see if they have one in stock, as not all Home Depot's carry them.
You can also order one from here:
Make sure that the total watts of the lights connected to the photo control does not exceed the watt rating of the photo control.

Dec 13, 2009 | Garden

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Landscape lighting transformer won't keep time. Anything I can do other than getting a new one. It seems like I have to get one every six months. Also my lights frequently go out, but if I give them a...

If its only the timer part that doesnt work why dont you buy a normal plug timer [you know the ones you use for home use like radios and light etc ] and plug the transformer into that and then set the timer and plug that into the outlet , there is no reason that would not work , hope this helps smirf617

Jun 03, 2009 | Weatherproof WT-12 - Single Circuit ...

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Malibu landscape lighting transformer problem

Testing ohms across A and B will read open circuit through transformer coil.
Testing DC voltage across terminals A and B should read 12 volts DC, and nothing less.
Transformer should make humming sound when working.
Test that receptacle has power and breaker is not tripped.

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

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

May 30, 2009 | Intermatic Malibu 300W Power Pack...

1 Answer

How to make multiple runs for low voltage transformer

Yes, It will work fine splitting it into 2 runs connecting them together in the transformer. It will work better than running them all on one line. Sometimes running them all on one line the last light s dimmer than the first light. I was an electrician for 14 yrs. and I promise you it will work.

Nov 14, 2008 | Weatherproof WT-12 - Single Circuit ...

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