MSD 6ALN Wiring Diagram

The MSD 6ALN is a popular ignition control box used in high-performance racing applications. Its primary function is to control the timing and spark intensity of the ignition system. Installing the 6ALN can be a bit tricky, but with the right wiring diagram, it can be a breeze. In this article, we’ll break down the wiring diagram for the MSD 6ALN and provide some common FAQs.

What is the MSD 6ALN?

The MSD 6ALN is an upgraded version of the MSD 6AL, designed for use in racing applications. The “N” in the name stands for NASCAR, as the control box was developed to meet the specific needs of NASCAR racing teams. The 6ALN has a higher spark energy output than the standard 6AL and can handle higher RPMs. It also has a built-in rev limiter, which is essential for preventing engine damage.

MSD 6ALN Wiring Diagram

Before we get into the wiring diagram, it’s important to note that the 6ALN is not a plug-and-play solution. It requires some wiring modifications to work properly. The wiring diagram for the 6ALN can be confusing, but we’ll break it down step-by-step.

MSD 6ALN Wiring Diagram
Wire Color Function
Red Battery Positive
White Trigger Input
Black Battery Negative
Yellow Starter Signal
Green Tach Output
Orange 12V Ignition Output

Step 1: Mounting the 6ALN

The first step is to mount the 6ALN in a location that’s easily accessible. It’s important to choose a location that’s away from heat sources and moisture. The 6ALN should be mounted with the heatsink fins in a vertical position to allow for proper cooling.

Step 2: Wiring the Battery Positive

The red wire should be connected to the positive side of the battery. This wire should be fused with a 20-amp fuse to protect the electrical system.

Step 3: Wiring the Trigger Input

The white wire should be connected to the distributor trigger input. This wire should be connected directly to the distributor, not through the original wiring harness. If your distributor doesn’t have a trigger wire, you’ll need to install an aftermarket distributor that does.

Step 4: Wiring the Battery Negative

The black wire should be connected to the negative side of the battery. This wire should be grounded directly to the battery or the chassis.

Step 5: Wiring the Starter Signal

The yellow wire should be connected to the starter signal. This wire should be connected to the starter solenoid or the starter relay.

Step 6: Wiring the Tach Output

The green wire should be connected to the tachometer input. This wire should be connected directly to the tachometer, not through the original wiring harness.

Step 7: Wiring the 12V Ignition Output

The orange wire should be connected to the ignition coil positive. This wire should be connected directly to the ignition coil, not through the original wiring harness.

FAQs

What is the rev limiter on the 6ALN?

The rev limiter on the 6ALN is a safety feature that prevents the engine from exceeding a certain RPM. This is important for preventing engine damage or failure. The rev limiter can be set by adjusting the rotary dials on the 6ALN.

Can I use the 6ALN with a distributorless ignition system?

No, the 6ALN is designed for use with a distributor-based ignition system. If you have a distributorless ignition system, you’ll need to use a different ignition control box that’s compatible.

What type of spark plugs should I use with the 6ALN?

You should use a high-performance spark plug that’s designed for racing applications. Check with your engine builder or the spark plug manufacturer for recommendations.

What is the warranty on the 6ALN?

The 6ALN comes with a limited warranty from MSD. The exact terms of the warranty may vary, so be sure to read the warranty information carefully before purchasing.

Do I need a professional to install the 6ALN?

While it’s possible to install the 6ALN yourself, it’s recommended that you have a professional do it. Wiring the 6ALN incorrectly can cause serious damage to your engine or electrical system. A professional installer will have the knowledge and tools to install the 6ALN correctly and safely.

In conclusion, the MSD 6ALN is a powerful ignition control box that’s popular in racing applications. Wiring the 6ALN can be a bit tricky, but with the right diagram and some basic knowledge of electrical systems, it’s an achievable task. Be sure to follow the instructions carefully and consult with a professional if you’re unsure about anything. With the 6ALN installed, you’ll have a reliable and high-performing ignition system that will give you the competitive edge on the track.