'94 premium sound aftermarket head unit question

mmarookiejoe · 11-14-2009, 10:42 PM

I have a 94 MR2 with premium sound. I have read on here that the Metra 8112 harness will be what I need to install and aftermarket head unit. I bought it, sure enough, it plugs in, but it doesn't work. I tested the stereo by hooking power and ground directly to the battery and the power comes on, so I know the stereo is OK. I have jacked with that stupid harness for an hour trying every possible combination of wiring and nothing works. I've installed numerous stereos, but I am at a loss... Any suggestions before I hang my head in disgrace and take it to a shop?

drateda.w.d · 11-15-2009, 12:18 PM

The stereo doesn't get power thru the harness? How's the ground with the harness?

mmarookiejoe · 11-16-2009, 09:03 AM

Quote:

Originally Posted by drateda.w.d

The stereo doesn't get power thru the harness? How's the ground with the harness?

Not sure about the ground, but thanks for the response. A guy from Metra's tech support told me that the 8112 isn't pinned right for and MR2, and I got tired of screwing with it so I took it to Ultimate Electronics. Took them 5 hours total (3 1/2 of actual work on the car) to get it working right. Then I went home, reran new speaker wires throughout the car, and installed my new 6.5" components. If it isn't raining when I get home, I will install my new 4" rear speakers, amp and sub.

supermr2 · 11-16-2009, 12:20 PM

I had the same problem. The harness is not grounded correctly and will not power the radio. Also when I installed mine I lost the rear subs.

11-14-2009, 10:42 PM	#1 (permalink)
mmarookiejoe Thesaurus-boy Join Date: Jun 2009 Location: Tulsa, Oklahoma Posts: 414 Thanks: 12 Thanked 12 Times in 12 Posts iTrader Rating: (1/100% )	'94 premium sound aftermarket head unit question I have a 94 MR2 with premium sound. I have read on here that the Metra 8112 harness will be what I need to install and aftermarket head unit. I bought it, sure enough, it plugs in, but it doesn't work. I tested the stereo by hooking power and ground directly to the battery and the power comes on, so I know the stereo is OK. I have jacked with that stupid harness for an hour trying every possible combination of wiring and nothing works. I've installed numerous stereos, but I am at a loss... Any suggestions before I hang my head in disgrace and take it to a shop?

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11-15-2009, 12:18 PM	#2 (permalink)
drateda.w.d Some Skills Join Date: Jul 2009 Location: Portland, Oregon Posts: 86 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	The stereo doesn't get power thru the harness? How's the ground with the harness?

11-16-2009, 12:20 PM	#4 (permalink)
supermr2 driving MR2's since 1992 Join Date: Feb 2006 Location: Panama City Florida Posts: 46 Thanks: 0 Thanked 1 Time in 1 Post iTrader Rating: (0/0% )	I had the same problem. The harness is not grounded correctly and will not power the radio. Also when I installed mine I lost the rear subs.