for anyone that has been wanting to do this swap i just recieved the wiring diagram for a 90-93 integra gsr cluster from a honda dealer.
all the wires from a 88-89 civic lx sedan match EXACTLY to a GSR cluster. All you have to do is trace the wires and find out which one goes to what....and here is the wire color chart for you for the gsr cluster because i KNOW you cant find it online..i searched for 3 days....
note this is for informational purposes only. dont blame me if you cant read and blow up your car. haha

yel/wht- fuel gauge
yel/grn- temp gauge
blu-tach
grn/blu- left signal indicator light
grn/yel- right signal indicator light
red/blu- high beam indicator light
yel/red- VSS
red/blk- gauge lights (dimmer control)
wht/blu- battery light
grn/orng- check engine light
yel/red- Check oil light
blu/red- ABS indicator
grn/blk- trunk light indicator
grn/red- parkig brake light indicator
grn/red-fuel indactor light
yel/red-seat belt light indicator
grn/red- door open light indicator

there ya go, that is for a 90-93 Integra
all the wires on my civic matched....not sure about other civics/crxs.....anyways enjoy your new gsr cluster!! i know i will mine, ill post pics when it is installed

 

wait,,do you have a integra motor in your car?

 

thanks, uneek4dr, that helps me a lot.