OTC 3642 Truck Electrical Circuit Tester - 12V-24V with 24 Foot Cord,Red

Needed a longer cord on my test light, my old one has a much shorter cord and shorter overall size. Old test light is also 12 volt. This test light is much bigger than my older test light and works perfectly for my application. I needed to reach down into a very constricted area and the added length works well for that. Ground clamp is well made and quite sturdy. Expect that this light will be trouble free for years to come.

Great way to add a light load so your multi meter will read loaded voltage and not lie to you. Longer wire is also nice. From back of the dump truck to the cab! Overall great product.

Great having a long lead for a large vehicle. Finding a good ground on a large vehicle can be a challenge when you want to test a circuit on a large vehicle. This works well. The point on the tester is easy to work with on circuit boards and easy to puncture wire insulation to a quick test. I found I like this better than the small ones and use it to check all my DC connections and fuses. Clip is big enough to grab on to a lot of large steel or small enough to grab a small screw or wire.

Excellent tool. Very durable. Probe length is a bit long for under dash work or tight quarters, but they make different models depending on your needs. Very well built tool.

My first one of these was a Matco branded one Same exact. That one Lasted for 10 years of steady use on trailers, trucks and excavators, until it lost connection in the coiled wire somewhere. Easily my favorite test light with Plenty of length to follow wires. Worth every penny.

This is my favorite test light. I’ve used a bunch in my career as a diesel tech. This ones the best. Long cord and a clip that you can actually clip on stuff. Occasionally the bulb looses contact but allYou have to do is unscrew it and screw it back together and that will get it working again.

I’m a big fan of incandescent test lights, you know, because they won’t lie to you like leds. The big plus for this one is the clamp. Love it. And the long cord is great too.

i like the clamp on this one. i use for bus and heavy duty trucks, many checkin bias voltage and just confriming grounds.