Beatrice Lang
The Nu-Relics Power Window Kit is a bolt-in kit that can be used to convert the manual windows of a 67-72 Suburban to electric ones. The kit includes 2 front door regulators (left and right side), 2 rear quarter regulators (left and right side), and 4 new ACI motors. The kit offers multiple power window switch options and works with both stock 2-piece windows and aftermarket 1-piece windows. It is important to note that the ACI motors in the kit are reverse polarity motors, requiring reverse polarity switches. This means that the ground is within the wiring harness rather than off the motor, and to identify this, there should be 5 or more poles on the back of a single switch.
| Characteristics | Values |
|---|---|
| Brand | Nu-Relics |
| Model | 67-72 Chevy Truck/Blazer/Suburban |
| Window Type | Power Window Kit |
| Warranty | Lifetime |
| Kit Components | 2 front door regulators (left & right side), 2 rear quarter regulators (left and right side), 4 new ACI motors |
| Switch Options | Multiple |
| Motor Type | ACI (reverse polarity) |
| Grease | Avoid soap-based lithium grease; use Die-Electric grease or Tuner Lube on terminals and connections |
| Oil | A few drops of lightweight oil in pivot points |
| Bushings | Bronze Oilite ® |
| Lubricant | High-temp automotive wheel bearing and chassis lubricant on regulator gear teeth and roller tracks |
| Fuse | In-line 30 AMP |
| Circuit Breaker | Compatible |
| Power Sources | Battery, extra slot in fuse panel |
| Relay | Not required for amperage boost; special relay needed for old-style 3-pole switches |
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What You'll Learn
The Nu-Relics Power Window Kit
The kit includes new ACI motors, which Nu-Relics has tested for quality, strength, and dependability. The motors are reverse polarity, which means the ground is within the wiring harness. The kit also includes regulators, with bronze oilite thrust bearings at all pivot points, and treated metal gears. Customers use their original glass channels, and multiple switch options are available.
The Nu-Relics kit is easy to install, with the power regulator bolting into the same location as the manual regulator. The kit works with stock 2-piece windows or aftermarket 1-piece windows. It is recommended that you avoid using older soap-based lithium grease, as this can harden in cold weather, making window movement more difficult. Instead, a few drops of lightweight oil in the pivot points will allow the bronze bushings to work smoothly and reduce wear.
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Grease and lubricant
When it comes to lubricating the power windows of a 1972 Suburban, there are several options available. It is important to avoid soap-based lithium grease, as it can harden in cold weather, making window operation more difficult. Instead, a few drops of lightweight oil in the pivot points will allow the Bronze Oilite ® bushings to work smoothly and reduce wear.
For the roller tracks, a plastic-safe lubricant such as silicone grease is recommended. White lithium grease is commonly used on plastic parts, but it is important to ensure that the grease is applied sparingly only where it is needed, as thicker greases can cause stiffness. Die-Electric grease or Tuner Lube should be used on all terminals and connections to protect against moisture and corrosion.
Additionally, a high-temperature automotive wheel bearing and chassis lubricant are recommended for the regulator gear teeth and roller tracks. This type of lubricant is designed to withstand higher temperatures and provide long-lasting protection for these components.
Some other general tips for lubrication and maintenance include using a small amount of grease between the coils of the spiral assist spring to prevent rust and degradation of window speed. A 3M Silicone spray can also be used on fuzzy runs and weather stripping to help with the break-in process.
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Switch options
The Nu-Relics 67-72 Suburban Front Doors & Rear Doors Power Window Kit offers multiple power window switch options. The kit includes two front door regulators (left and right sides), two rear quarter regulators (left and right sides), and four new ACI motors.
You can add a switch kit at a discount. If you add a switch kit, conduit will be included at no additional charge. If no switches are required, motor plugs and terminals will be included. If you choose Nu-Crank Switches, consider adding a master switch to control the other windows. It is important to note that the ACI motors are reverse polarity motors and require reverse polarity switches. This means that the ground for the system must come out of the master switch.
You can hook your windows up to a variety of different power sources. Some options are: straight to the battery (windows should not have any battery draw when not in use), or finding an extra slot in the fuse panel and tying in using the supplied fuse. In most cases, you will not need to use a relay to boost amperage to the motors. The switches and wiring can handle the amp draws.
If you are using old-style 3-pole switches, a special relay is needed to reverse the polarity at the motor. These do not increase amperage, they just swap the ground from side to side.
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Harness and fuse
The Nu-Relics Power Window Kit for the 67-72 Suburban includes a wiring harness and a fuse. The kit allows you to transform your manual window to electric. The wiring harness will come with an in-line 30 AMP fuse. A circuit breaker can be used instead of a fuse.
The kit offers multiple power window switch options and a lifetime warranty. It includes two front door regulators (left and right side), two rear quarter regulators (left and right side), and four new ACI motors.
You can add a switch kit at a discount. If you add a switch kit, conduit will be included at no additional charge. If no switches are required, motor plugs and terminals will be included. If you choose Nu-Crank Switches, consider adding a master switch to control other windows.
The ACI motors included in the kit are reverse polarity motors and require reverse polarity switches. This means that the ground for the system must come out of the master switch. There are two poles on the motor. To make it operate, you must put power to one side and then ground to the other side. By swapping the wires from side to side, the direction will change.
If you are having issues with your power windows, it is recommended to first check your fuses. You can usually find a diagram for the fuses in the owner's manual or on the back cover of the fuse box. If the fuses are intact, the problem could be in the harness where it goes through the door jamb. This is a common place for wires to chafe, break, or corrode.
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Motors and polarity
The ACI motors in the Nu-Relics 67-72 Chevy Truck/Blazer/Suburban are reverse-polarity motors and require reverse-polarity switches.
A DC motor doesn't have a specific polarity. The polarity depends on which way you spin it. If you connect the green wire to the positive terminal and the yellow wire to the negative, it spins in a particular direction. When the polarity is reversed, it spins in the opposite direction. There is no harm in connecting it. You can connect and test its direction.
DC motors can usually run with either polarity, but the direction of rotation will be reversed. The armature draws more current than the field, so it needs a heavier wire. The internal wires have a very thin insulation coating and may appear thinner. They also generally run much hotter than the supply cables. Using such thin conductors on the supply would melt the insulation.
Some DC motors have the brushes adjusted (rotated slightly) to minimise sparking at high speed. These may still run backward, but not very well, so it is not recommended. Common RC car "can" motors often have a direction arrow printed on them, but similar ones sold for industrial applications may not. Also, some types of highly optimized motors (such as little pager motors) with single-leaf brushes are far more likely to break if run backward.
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Frequently asked questions
The Nu-Relics Power Window Kit is a bolt-in kit that can be used to convert manual windows to electric windows.
The kit includes regulators/motors and optional wire harnesses/switches and conduit for all doors. The kit works for stock 2-piece windows or aftermarket 1-piece windows.
The kit uses new ACI motors that have been tested by Nu-Relics for quality, strength, and dependability. These motors are reverse polarity motors and require reverse polarity switches.
