Return to the BUILD

“In this stage, you complete the assembly of the rear lightbar, fitting it to the roof of your Ectomobile.”

As many of the steps in this stage are identical to those in Stage 129, I reused some of those pictures here.



Materials: The Separator Panel and Lightbar Trim are metal and the other parts are plastic.

Magazine – Issue 35

  • Model Instructions
  • Ghostbusters II Soundtrack: Randy Edelman’s Score and the Pop Hits
  • Slime Scooper: The Device Used to Gather Slime Samples
  • Puzzle Busters: A Look at Ghostbusters Nerd Search
  • The Art of Kurt W. Conner: Ghostbusters’ Illustrator and Sculptor
  • Ecto-101: The Chinatown Ghost


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.

Completing the Rear Lightbar

Step 01

Head over to your Ecto-1 Body assembly and disconnect the Code 3 Force 4XL LED cable (67E with the small circuit board) from the shorter end of the Code 3 Force 4 XL Extension Wire (67F marked ‘N’):

Then, retrieve your Lightbar assembly from the previous stage and fit the sliding switch of the Code 3 Force 4 XL LED cable into this matching slot of the Base.

This switch is oriented properly when the empty pin (with no wire attached) is closer to the center of the Lightbar, as shown:

Next, slide this notch of the Motor Retainer around the wires of the switch and then fit it down into the Lightbar Base, as shown.

This step will also capture the two Motors in place. Make sure their wires are safely routed so they do not get trapped, and that they are fully seated in their rounded recesses and engaging the Gear 2 teeth on both sides:

Secure the Motor Retainer to the Base with three (3) EP screws.

There is a small amount of play in how the Motors fit in their recesses. You may want to apply light pressure on each worm gear (towards the respective Gear 2) as you tighten these screws to improve how they mesh (and where much of the unwanted noise comes from):

Finally, connect the plugs of the Motors to the matching plugs on the short red/black wires of the Code 3 Force 4XL LED board:

Step 02

Feed the plug on the grey/black wires of the Code 3 Force 4XL LED board down through this hole of the Lightbar Base:

Follow this plug through the same hole with the four LED cables of the Code 3 Force 4XL LED board:

Turn your Lightbar Base assembly over and fit the LEDs fully down into these matching holes. Start with the longest LED cable and progress to the shortest cable, as shown.

Ignore the blue lenses seen in these photos, I took them during a different stage of one my many rebuilding sessions:

Slide the pins of the LED Covers down into the holes on each side of the Lightbar Base, capturing the respective LEDs in place, and secure it into place with one (1) EP screw.

IMPORTANT: When we go to install this rear Lightbar assembly to the car, there is very little clearance between the rear Lightbar Base and the roof of the car. Therefore, I highly recommend you DO NOT install these two LED Covers. Having these in place will make it more difficult to fit the lightbar to the brackets on the roof. Instead, as with my front Lightbar, I used pieces of aluminum tape here. Each LED was firmly held in place before adding each piece so they would be properly positioned in the center of each Rotator:

All of the extra wiring slack was tucked back through the hole and into the Lightbar Base:

Route the grey/black wires of the Code 3 Force 4XL LED board through the tabs of the Wire Retainer and secure it to this location on the bottom of the Lightbar Base with one (1) MP screw.

The Wire Retainer will also interfere with the installation of this rear Lightbar, so I did not install it either:

Finally, fit the Code 3 Force 4XL LED board and any extra wiring down into this center section of the Motor Retainer, and then cover it with a Sticker, as shown:

How these wires and board are fitted is not important as long as none of them are damaged, disconnected, or interfere with any of the mechanisms. This area will soon be covered by the Separator Panel and therefore not easily seen:

Step 03

Fit the two Lightbar Underside parts to each side on the bottom of the Front Lightbar Lens.

I found it a lot easier to complete this step if we instead use tiny drops of super glue to secure these Lightbar Underside strips to the Lightbar Base itself. The ends of each Underside have circular tabs that match to posts on the base, as shown. This picture is an example of one Underside installed – we can attach them both in this step:

As with the front Lightbar back in Stage 129, I added the missing diamond shaped ‘mirrors’ between each pair of Rotators. See that page for the full details on this modification:

Fit the Lightbar Base assembly into the Front Lightbar Lens as shown, and then secure the Lightbar Base to the Lens with six (6) XP screws.

Take your time here, just make sure no wires become dislodged or pinched as you fit the Base inside the main Lens.

NOTE: This is a picture of the front Lightbar. Ignore the Wire Retainer seen here – we don’t want this installed on the rear Lightbar:

Carefully bend the Separator Panel to match the top shape of the Lightbar Lens.

To get this right, I used my duck bill pliers to start bending at the middle and work my way out to the edges. I constantly placed the Panel on the Lens as I went to get the angles to match as close as possible:

Fit this Panel to the center of the Lightbar Lens with the perforated holes on the front side.

The front of the Lightbar is where the switch is located and opposite from the grey/black wires:

Gently bend the last two surfaces of the Separator Panel around the bottom edge of the Lightbar Lens to secure it into place:

Peel the backing paper from the two Lightbar Trim parts and adhere them into these matching recesses on either side of the Separator Panel:

Installing the Lightbar
Step 04

Retrieve your main Body/Chassis assembly and your two Lightbar Foot Supports from the previous stage. Fit the Lightbar Foot Support L to this matching location on the left rear roof of the Body:

Secure this Foot to the roof from above with two (2) white VM screws:

Repeat this process to install the Lightbar Foot Support R to the opposite side of the roof using two (2) more white VM screws:

Fit the Front Lightbar assembly down between the two Lightbar Feet with the perforated section of the Separator Panel facing rearward.

There is a tab and slot at each Foot that must match up for the Lightbar to sit fully down. If we had installed the LED Covers and Wire Retainer, this fitment would be much more awkward:

Secure the Lightbar to the Foot on each side with two (2) white AP screws – four screws in total:

Reconnect the plug on the grey/black wires of the Code 3 Force 4XL LED board to the free end of the Code 3 Force 4 XL Extension Wire.

(Optional) Once connected, you can power up the model and press the Left Radio Button on the interior to test the operation of this Lightbar:


It is a sigh of relief to finally have both Lightbars installed onto the car. I spent a ton of time messing with them!

Next Up

Stage 132 – Federal C5GB Siren, Whelen HRDF-200 Strobe Light, Federal 19 Propello-Ray, Roof Frames

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