Got everything ready to install my dual digital spa gauges (oil pressure/temp) and have it all worked out, except I cannot find a easy route for the wires into the interior through the bulkhead. Gunna install the gauge in the speaker pod. Switched live from the option 2 - IG2 in the fuse box etc...

I've looked under the fuse box and everywhere else. Cant find anything really easy....

 

Pick up some rubber grommets and just drill a hole where ever you want it. Put the grommet in the hole to keep the wire from getting worn.

 

Easier said than done of course... There is supposed to be some unused rubber grommet under the fuse box area which others have used, however I can't find it on my Prelude.... Access is not easy even to drill a hole....

 

remove the fuse box on the passenger side of the engine bay near the firewall....there will be a rubber plug that you can remove and slide the wire in. I will emerge near the ecu on the passenger side under the dash by the passsenger feet.

 

Thanks, but I'm from the uk and we have RHD cars (same as JDM) so your description of passenger side is opposite to ours. But you would think it would be the same but reversed...

However, where the fuse box is (drivers side) underneath I see no spare grommets. On our passenger side I found 1 unused grommet near the abs reservoir which I poked out to find its somewhere behind all the heater blower stuff on the inside and can't get access (cant get the grommet out or back in either )

 

drill the hole from the inside not from the engine bay. Just pull the carpet back and put you a hole close to where you want it to come out in the bay. I realise it's easier said than done but I did it. It's really not THAT difficult. If you can't get a drill under your dash your doing it wrong.

 

if the heater blower is in the way just pull it off temporarily until the wires get ran through. it's pretty easy to remove and reinstall. also you can see if any crud got built up in the blower. i did a while ago and there was some sort of nest in there...