Where is the K40 overload protection relay located?
Troubleshooting should obviously begin with any diagnostic trouble codes (DTCs), followed by checking for blown fuses. If those lead to dead-ends, the K40 is worth scrutinizing. The K40 relay is located in the control module box, under the hood. In left-hand-drive R170 SLKs, this box is near the exhaust manifold.
Where is the K40 relay on a SLK 230?
If those lead to dead-ends, the K40 is worth scrutinizing. The K40 relay is located in the control module box, under the hood. In left-hand-drive R170 SLKs, this box is near the exhaust manifold. A heat shield and a blower motor keep the electronics in the box cool.
Where do I find the fuse box diagram?
However, sometimes the wire may look intact even in the blown fuse. Fuse box diagrams presented on our website will help you to identify the right type for a particular electrical device installed in your vehicle. Use our website search to find the fuse and relay schemes (layouts) designed for your vehicle and see the fuse block’s location.
What should I do if my K40 malfunctions?
When the K40 malfunctions, these components don’t get their required voltage. Troubleshooting should obviously begin with any diagnostic trouble codes (DTCs), followed by checking for blown fuses.
Where do you run the wire from a relay?
The diagram shows two leads coming from the relay. Then I run the second wire of the lights or other accessory to a good ground on the frame of the vehicle. If the wires will not be soldered together and crimped connectors will be used it’s a good idea to put a dielectric paste on the connectors where they come in contact.
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What kind of relay do I need for my 4×4?
The switch that is installed in the cab of your 4×4 actually only powers the relay itself which draws very little current. In most installations a 30 AMP relay from Radio Shack (Auto Relay Cat. Number 275-226) will do unless your amperage demands exceed 30 amps. I like to used a lighted switch in the cab to let me know if driving lights are on.
How do you connect a light relay to a battery?
Then run a heavy gauge wire from the battery to the relay placing a 30 Amp fuse in line very close to the battery. Do not connect the power to the battery until all wiring is done. Then I run a single heavy gauge wire out to the lights or other accessory.
How many fuses are in a Mercedes K40 relay module?
Remove the four phillips screws and the cover will pop off. Here you can see the module sort of tucked under a wiring harness. The relay module has five plugs (all different sizes so you won’t mess up when you reconnect them!), five 15 amp fuses, and one large red 40 amp fuse.
How many amps does a Mercedes relay module have?
The relay module has five plugs (all different sizes so you won’t mess up when you reconnect them!), five 15 amp fuses, and one large red 40 amp fuse.
If those lead to dead-ends, the K40 is worth scrutinizing. The K40 relay is located in the control module box, under the hood. In left-hand-drive R170 SLKs, this box is near the exhaust manifold. A heat shield and a blower motor keep the electronics in the box cool.
Troubleshooting should obviously begin with any diagnostic trouble codes (DTCs), followed by checking for blown fuses. If those lead to dead-ends, the K40 is worth scrutinizing. The K40 relay is located in the control module box, under the hood. In left-hand-drive R170 SLKs, this box is near the exhaust manifold.
How can I repair my Mercedes SLK 230 overload protection relay?
A brass clip (green arrow) keeps the K40 in place. Pressing it outward sets the K40 free. Pull the plugs off the K40 and remove it from the car. A skinny flathead screwdriver can be used to pry the relay board out of the case. Check the relay side of the board for obvious problems: charred or loose connections, etc.