85‑05 Chevy Astro GMC Safari Trailer Wiring Light Kit Harness Kit Plug (Splice)
Model: 20252-20This Product Fits The Following Vehicles:
1985 - 1994 Chevrolet, Astro, Standard Body
1990 - 2005 Chevrolet, Astro, Extended Body
1985 - 1994 GMC, Safari, Standard Body
1990 - 2005 GMC, Safari, Extended Body
- Easy do-it-yourself tow vehicle wiring kits for applications without T-One Connectors
- Test light included on 20251 & 20252
- 16 gauge wire w/4-Flat dust cover
- Installation Instructions
Thank you for choosing Tekonsha, the most powerful name in trailer light wiring and brake control system. Trailer wiring kit comes with a 1 year warranty and everything necessary to install the trailer plug wiring. Tekonsha manufactures a wider range of different products for hooking up trailer lights to your Car Truck or SUV. Our connectors work great with boat trailer wiring and utility trailer wiring. Typically those trailers will use the standard 4 flat plug which is what our Wiring Kits offer. If you have an RV Fifth Wheel or any other large type of trailer you will us a 7 pin trailer plug to control your electric trailer brakes. Tekonsha offers 7 pin trailer connector as well. Simply do a search above to see if there is a 7 wire trailer wiring available for hooking up your 7 way. If there is not you can use part number 85343 trailer wiring adapter to convert any 4-Flat into a 7-Way. In addition you will use part number 20506 which will include the rest of wiring needed for electric brake controls. You can also call us or email us any time and we will be able to provide information you need.
Partial list of fitment years: 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005
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Product Details
- Brand: Tekonsha
- Model: 20252-20
- Includes: Wiring Connector
Compatibility Chart
Description
This Product Fits The Following Vehicles:
1985 - 1994 Chevrolet, Astro, Standard Body
1990 - 2005 Chevrolet, Astro, Extended Body
1985 - 1994 GMC, Safari, Standard Body
1990 - 2005 GMC, Safari, Extended Body
- Easy do-it-yourself tow vehicle wiring kits for applications without T-One Connectors
- Test light included on 20251 & 20252
- 16 gauge wire w/4-Flat dust cover
- Installation Instructions
Thank you for choosing Tekonsha, the most powerful name in trailer light wiring and brake control system. Trailer wiring kit comes with a 1 year warranty and everything necessary to install the trailer plug wiring. Tekonsha manufactures a wider range of different products for hooking up trailer lights to your Car Truck or SUV. Our connectors work great with boat trailer wiring and utility trailer wiring. Typically those trailers will use the standard 4 flat plug which is what our Wiring Kits offer. If you have an RV Fifth Wheel or any other large type of trailer you will us a 7 pin trailer plug to control your electric trailer brakes. Tekonsha offers 7 pin trailer connector as well. Simply do a search above to see if there is a 7 wire trailer wiring available for hooking up your 7 way. If there is not you can use part number 85343 trailer wiring adapter to convert any 4-Flat into a 7-Way. In addition you will use part number 20506 which will include the rest of wiring needed for electric brake controls. You can also call us or email us any time and we will be able to provide information you need.
Partial list of fitment years: 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005
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85-05 Chevy Astro GMC Safari Trailer Wiring Light Kit Harness Kit Plug (Splice) Install Notes
Installation Instructions for Trailer Light Wiring Kit
Part Number:
- 20252
Tools Required:
- Hot Air Gun or Appropriate Heat Source
- Wire Crimpers
- Drill (3/32” Drill Bit)
- Phillips Head Screwdriver
- Circuit Tester
Step-by-Step Instructions:
Step 1: Locate the Taillight Wiring Harness
- Access the vehicle's taillight wiring harness.
- Using the provided instructions, identify the appropriate wires for connection:
- Green Wire: Right Turn & Stop
- Yellow Wire: Left Turn & Stop
- Brown Wire: Taillights
- White Wire: Ground
Step 2: Make the Electrical Connections
-
Match the color-coded wires from the wiring kit to the corresponding vehicle wires.
- Use a circuit tester to verify each wire's function before connecting.
- CAUTION: Test one wire at a time to prevent damage to electronic components.
-
Connect the wires using the provided insulated butt connectors:
- Strip the ends of each wire and seat them properly in the connector.
- Use a crimping tool designed for insulated splices to secure the connections.
-
Heat the connectors:
- Apply heat directly to the center of each splice using a hot air gun.
- Work from the center outward until the tubing recovers and adhesive flows.
- Allow the connections to cool before inspecting for integrity.
Step 3: Ground the System
- Locate a grounding point near the wiring harness, such as the vehicle frame or cross member.
- Do not drill into the vehicle floor or bed.
- Clean the area to remove dirt, rust, or undercoating.
- Drill a 3/32" hole at the grounding point and secure the white wire using the provided eyelet and screw.
Step 4: Verify the Installation
- Test all connections using a circuit tester or trailer:
- Verify the functionality of taillights, turn signals, and brake lights.
- Ensure all connections are complete and secure.
- If issues are identified, double-check the wiring and connections for errors.
Step 5: Store the 4-Flat Connector
- Store the 4-flat connector in the rear cargo area when not in use to protect it from damage and environmental exposure.
Warnings and Notes:
- WARNING: Overloading a circuit can cause fires. Do not exceed the following limits:
- Stop/Turn Lights: 7.5 amps (1 per side)
- Tail Lights: 7.5 amps
- WARNING: Always verify what is behind any surface before drilling to avoid vehicle damage or injury.
- NOTE: Trailer lighting that requires more than 7.5 amps per circuit must use a Trailer Light Power Converter.
- NOTE: If your trailer requires a plug other than the 4-flat, consult your dealer for optional 6-way or 7-way adapters.
Maintenance:
- Inspect the wiring harness periodically for damage, corrosion, or loose connections.
- Reapply heat to connectors if the adhesive seal weakens.
Specifications:
- Maximum Load:
- Stop/Turn Lights: 7.5 amps (1 per side)
- Tail Lights: 7.5 amps
- Recommended Grounding Hole Size: 3/32 inches
