Headlight motor replacement advisary - ZR-1 Net Registry Forums

GOLDCYLON · 01-31-2018

A couple of weeks before Christmas my Passenger headlight motor stopped working on my 90 Auto Z. It would go about half way and up and stop. Upon investigation a cracked plastic gear was the issue and bits were binding in the mechanism. So I ordered this replacement unit from Corvette Central. After waiting a month it finally showed up. The installation was very straightforward and came with no directions. Basically its four bolts and 2 nuts. Not a hard job. I was a little skeptical as the unit was sporting a made in China label on the box which did not inspire confidence.

https://www.corvettecentral.com/c4-8...2-wire-444342r

After the installation I turned the light on and the Drivers side functioned normally and the newly installed Passenger headlight turned 100% the opposite way. After scratching my head and checking the connector I assumed the manual trimming knob was not set correctly. So I trimmed both the manual headlight knobs to even and tried again. NOPE. Same reaction. So I unplugged the 2 pin connector and incorrectly reversed it. BINGO. The Chinese Polarity Commission had wired the unit backwards. The good news story is this unit uses a clamshell weather packed connecter so opening the connector and then unpinning the pins (If you have unpinning tools) was pretty easy.

As the motor was 28 years old and had been rebuilt a couple of times before and now with a broken gear it was time to look for a replacement that I could take apart to repair correctly as I did not have a handy core replacement to send in.

This is GC reporting. OUT

01-31-2018	#1
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,155	Headlight motor replacement advisary A couple of weeks before Christmas my Passenger headlight motor stopped working on my 90 Auto Z. It would go about half way and up and stop. Upon investigation a cracked plastic gear was the issue and bits were binding in the mechanism. So I ordered this replacement unit from Corvette Central. After waiting a month it finally showed up. The installation was very straightforward and came with no directions. Basically its four bolts and 2 nuts. Not a hard job. I was a little skeptical as the unit was sporting a made in China label on the box which did not inspire confidence. https://www.corvettecentral.com/c4-8...2-wire-444342r After the installation I turned the light on and the Drivers side functioned normally and the newly installed Passenger headlight turned 100% the opposite way. After scratching my head and checking the connector I assumed the manual trimming knob was not set correctly. So I trimmed both the manual headlight knobs to even and tried again. NOPE. Same reaction. So I unplugged the 2 pin connector and incorrectly reversed it. BINGO. The Chinese Polarity Commission had wired the unit backwards. The good news story is this unit uses a clamshell weather packed connecter so opening the connector and then unpinning the pins (If you have unpinning tools) was pretty easy. As the motor was 28 years old and had been rebuilt a couple of times before and now with a broken gear it was time to look for a replacement that I could take apart to repair correctly as I did not have a handy core replacement to send in. This is GC reporting. OUT __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V Last edited by GOLDCYLON; 01-31-2018 at 12:21 PM.