Return to the BUILD

“In this stage, you fit the gears to the base of the rear lightbase, ready to have the dome fitted to it in the next phase of assembly.”

These steps will be identical to those we followed to build the first Lightbar in the previous two stages.



Materials: The Lightbar Foot Supports are metal, while the other non-electrical parts are plastic.


NOTE: I always planned on making modifications to the Lightbar assemblies to improve their appearance and operation. Many of the simpler changes are embedded in these steps. However, the more advanced changes can be found on my dedicated Lightbars Mod page. If you have any interest in trying any of these modifications yourself, I recommend reading through that page and all of the steps here before you begin the Lightbar assembly process.

Rear Lightbar Base and Gears

NOTE: I have slightly changed the order of the steps in this stage to make the process easier to follow. Also, as I rebuilt my Lightbars numerous time to find the best way to build them, some of these pictures may show my Lightbars in various states of assembly. Focus on the wording and you’ll be fine.

Step 01

On the bottom of the Lightbar Base, fit the Lightbar Support L (marked ‘L’) to this matching left-side location. There is a locating pin that matches an alignment hole to ensure only the correct part can be placed here:

I moved this step to the beginning so we could install them without exerting any extra force on the Gears/Rotators:

Secure this Support into place with two (2) EP screws:

In the same way, fit the Lightbar Support R to the other end of the Lightbar Base and secure it into place with two (2) more EP screws:

Step 02

Before we install the Gears, I noticed this extra piece of plastic ‘flashing’ on my first Lightbar Base. As I believed it could interfere with the Gears, I simply removed it with my hobby knife. You may want to check your own Lightbar Bases for any similar molding residue on both ends:

With the Lightbar Base oriented as shown, fit two Gear 1 (128K) and two Gear 2 (128L) over the matching posts on the left side of the Base, meshing the four Gears together.

There are three sizes of Gears. From smallest to largest diameter, they are Gears 2, Gears 1, and Gears 3, as shown:

Knowing this, we can install the two Gears 1 and two Gears 2 to the Lightbar Base. The two small posts on each Gear 1 should be facing up, as shown. For future reference, this is the left (driver’s) side of the Lightbar:

Using a cotton swab, apply a small amount of the Lubricating Oil to the teeth between each these Gears.

While the supplied ‘silicone grease’ Lubricating Oil is usable, I decided to use my trusty 3-in-One Oil here instead. It accomplishes the same task, but without the sticky viscosity of the grease. Either way, I recommend adding your chosen Oil with a toothpick as cotton swabs tend to absorb the lubricant as much as they apply it:

Fit a Rotator over the matching posts of a Gear 2, and then secure these parts together from above with two (2) BP screws.

This is how a Rotator is attached to a Gear 2 (outside of the Lightbar):

Repeat this process to install a Rotator onto the other Gear 2, as shown:

Then, fit the Gear Cover Left (marked ‘L’) over these Gears and align the screw holes, as shown.

The smooth side of this Cover should be facing up. In the instructions, this Gear Cover is installed before the Rotators, but I wanted to make sure my Rotators were facing the direction they were seen in the Ghostbusters film. See my Mod Zone below for the details:

Secure this Cover into place with five (5) EP screws:

Finally, repeat this process to install the remaining Gears 1Gears 2, and Rotators to the right side of the Lightbar Base. Enclose them with the Gear Cover Right (marked ‘R’) and secure it into place with five (5) more EP screws, as shown:

I apologize for this picture (the Rotators are missing), it was taken during a different stage of my multiple assembly sessions:

The real Code 3 lightbar used in the film only had single-lensed rotators. To replicate this, I decided to use some pieces of aluminum tape to block off one side of our model’s Rotators. First, I used one of the Rotators to press four matching shapes into a piece of the tape:

These shapes were then cut from the tape:

I stuck these shapes to one end of each Rotator, as shown:

I may be a bit OCD, but I also decided to take it a step further and wanted to match the exact position of these Rotators within my Lightbar to match the movie. Going frame by frame, I determined the proper orientation of each Rotator and created this graphic showing where the light should point:

With this information, I removed and then keyed all of my Gears 2 to match:

Step 03

Fit the two Gears 3 onto these matching pins of the Lightbar Base, with the larger gear on top as shown:

Fit the two Motors into these matching recesses of the Base, ensuring the worm gear engages with the teeth of each Gear 3, as shown:

There is nothing securing these Motors in place so we can’t ensure the engagement just yet. Just make sure they fit properly and align to the Gears 3:

Apply a small amount of the Lubricating Oil to the worm gear of each Motor.

Again, I used my 3-in-One Oil here instead of the supplied grease:

Step 04

Fit the T-shaped end of a Lightbar Foot Support to each Lightbar Foot as shown, then secure these parts together with one (1) GP screw.

As far as I could tell, both of these Foot Supports are the same so they can be fitted to either Foot.

NOTE: Once these Lightbar Feet are assembled, the instructions would have us install them onto the main Body, but I chose to wait until we have the Lightbar built so we only have to retrieve the heavy Body/Chassis assembly once. Save the VM screws from this stage until that time:


These assembly steps were exactly the same as the first Lightbar, so nothing too much to say here. We will get all of this wrapped up and installed when the next parts arrive. Keep these assemblies safely stored until then.

Next Up

Stage 131 – Lightbar Undersides/Trims/Rear Lens, Separator Panel, Motor Retainer, LED Covers, Wire Retainer (Coming Soon)

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