There's a very simple way of utilizing a voltage converter and 4 24v relays to replicate the actions of an expensive 24-12v logic circuit.
The problem with JDM and some NA Land Cruisers is that we run a 24v electrical system while most things here run on 12v. Further, our tail lights have separate turn and brake signals while most trailers have the turn and brake lights combined. So, in order to utilize the common 4-plug trailer wiring, we need a logic circuit that will flash the appropriate turn signal while the brake lights are also activated (as in the situation of waiting at an intersection to make a left hand turn).
Further, most aftermarket logic circuits are made to work with 12v, not 24v...although an engineer at Hoppy assured me that their heavy duty model will work for both.
This method of using relays will assure that there is no heat buildup from using resistors to step down the voltage, and should be reliable providing that good quality relays are used (ie. Hella 87426).
You only need a few things:
-A good 24v-12v step down voltage converter already installed and in working order (ie. Solar Converter converter).
-Four Hella 87426 24v relays.
-Appropriate wiring, connectors, taps, and loom.
-A common 4-plug trailer connector.
-Basic electrical knowledge/skills.
Here's the diagram (thanks for the correction, Bruce):
I have not yet installed this on my vehicle...but I don't see why it shouldn't work. I will install mine as soon as I find a suitable protective case to house the 4 relays.
Note that the source wire for +12v power should be fused appropriately.
If anyone local here in the Lower Mainland BC is wanting this done to their Cruisers, but is not comfortable with doing the electrical work themselves, I would be happy to do the installation...although I haven't worked out the pricing yet. If you need a converter, G&S Cruiser Parts have them available.
Hope this helps solve some problems that some of you who would like to tow a trailer are struggling with.
Let me know what you think.
The problem with JDM and some NA Land Cruisers is that we run a 24v electrical system while most things here run on 12v. Further, our tail lights have separate turn and brake signals while most trailers have the turn and brake lights combined. So, in order to utilize the common 4-plug trailer wiring, we need a logic circuit that will flash the appropriate turn signal while the brake lights are also activated (as in the situation of waiting at an intersection to make a left hand turn).
Further, most aftermarket logic circuits are made to work with 12v, not 24v...although an engineer at Hoppy assured me that their heavy duty model will work for both.
This method of using relays will assure that there is no heat buildup from using resistors to step down the voltage, and should be reliable providing that good quality relays are used (ie. Hella 87426).
You only need a few things:
-A good 24v-12v step down voltage converter already installed and in working order (ie. Solar Converter converter).
-Four Hella 87426 24v relays.
-Appropriate wiring, connectors, taps, and loom.
-A common 4-plug trailer connector.
-Basic electrical knowledge/skills.
Here's the diagram (thanks for the correction, Bruce):
I have not yet installed this on my vehicle...but I don't see why it shouldn't work. I will install mine as soon as I find a suitable protective case to house the 4 relays.
Note that the source wire for +12v power should be fused appropriately.
If anyone local here in the Lower Mainland BC is wanting this done to their Cruisers, but is not comfortable with doing the electrical work themselves, I would be happy to do the installation...although I haven't worked out the pricing yet. If you need a converter, G&S Cruiser Parts have them available.
Hope this helps solve some problems that some of you who would like to tow a trailer are struggling with.
Let me know what you think.
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