Will this tool work on RV seven pin hook ups?

If it's the 7 round pin connection not the 7 flat pins, it should. This is intended for class 8 trucks, some rv's are just as big and use the same lighting circuits. But this tool is just a test light for 12v multiple circuits, I would just use a 12v test light for a rv if your not sure

Does this fit the larger 7 pin connectors (approximately 1-1/2") or is it for the smaller diameter (approx. 1" diameter) connectors?

This is for heavy duty trucks. Most medium and light duty trucks use a 7 pin blade configuration. Also, the approximately 1 inch diameter trailer plugs are 6 pin, not 7. 6 pin plugs do not have an auxiliary power line to the trailer.

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Innovative Products of America (7865L) 7-Way Round Pin Tractor Trailer Circuit Chaser™ for Testing Turn Signals, Hazard Lights, Brake Lights and More

Innovative Products of America (7865L) 7-Way Round Pin Tractor Trailer Circuit Chaser™ for Testing Turn Signals, Hazard Lights, Brake Lights and More

Product ID: 31277376

Details

Brand
Innovative of
Color
Black
Item Weight
0.6 Pounds
Power Source
Corded
Style
Circuit Tester

💡LED indicators for instant circuit status

🔌7-way round pin compatibility

🛠️Extra jumper connector included

€ 83.62

Duties & taxes included

In stock

Sold byAmazon NetherlandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Master your trailer’s circuits like a pro—never get stranded in the dark!

ERGONOMIC WINGED GRIP - Effortless removal from connectors keeps your workflow smooth and fast.
ONE MAN ROADSIDE SAVIOR - Simplify on-the-go troubleshooting with a tool designed for solo pros.
VERSATILE TESTING POWER - Extra jumper connector means you’re ready for any electrical challenge.
VISUAL CLARITY WITH LE DS - Instantly see which circuits are live—no guesswork, just confidence.
TRUSTED AMERICAN CRAFTSMANSHIP - Backed by a family-owned brand with decades of professional tool innovation.

The Innovative Products of America 7865L Circuit Chaser™ is a compact, 7-way round pin tester designed for professional-grade troubleshooting of trailer turn signals, hazard lights, and brake lights. Featuring bright LED indicators and an extra jumper connector, it enables quick, accurate diagnostics on the road. Its ergonomic winged grip ensures easy handling, making it an essential tool for vehicle maintenance professionals and serious DIYers alike.

Specifications

Asin	B000HI48KI
Best Sellers Rank	#38,134 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #68 in Circuit Testers
Brand Name	Innovative Products of America
Color	Black
Compatible Devices	Vehicles and trailers with 7-way round pin towing circuits
Customer Reviews	4.8 4.8 out of 5 stars (2,044) 4.8 out of 5 stars
Global Trade Identification Number	00893509000141
Included Components	Packaged with an extra brass jumper
Item Dimensions	4.75 x 3 x 2 inches
Item Type Name	Circuit Tester
Item Weight	9.6 ounces
Manufacturer	Innovative Products of America
Measurement Type	Circuit Tester
Model	7865L
Number Of Items	1
Part Number	7865L
Power Source	Corded Electric
Specification Met	Ipa
Style Name	Circuit Tester
Unit Count	1 Count
Upc	893509000141
Warranty Description	1-Year Limited

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