Troubleshoot landscape lighting short
I've had outside landscape lighting for several years without problems. However, I hired a person to spread mulch this year and they left mulch piled on the lights, resulting in a fire. I lost several of my lights as well as plants. I had someone come in and replace the lights and wires. The transformer is plugged into an outside electrical outlet which runs from a gfi outlet in the garage. When I plug in the transformer, the gfi trips; sometimes this takes awhile and sometimes it is immediate.
Now, my question: how do I trace where the problem is...the wiring or the transformer?
I know it is not the gfi because I've plugged the transformer into two gfi's with the same result.
Any help you can provide would be greatly appreciated!