Bobby Suth

iTrader: (2)

Here's the info. 88 Camaro with TBI. Turns over and that's about it. Fuel pump works to. When I got it the fuel pump fuse was blown. The Po hacked wiring bad. Would start with starting fluid. So coil did work. I pulled the engine harness and installed another clean one. Turn key on and no engine light or anything. Po had 30 amp fuse for ECM and 20 for each injector. I tested the fusable link near battery going to ECM and it's good. I have no power to injectors,coil or fuse box for ECM and injectors so far. Where do I go from here?

dmccain

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Convert to carb..

WildCard600

Or standalone aftermarket EFI.

Tuned Performance

iTrader: (92)

Have you verified that c100 is correct for the new harness ?
Accessory power for the ecm and check engine light go through c207 is that hooked up.
Its the connector left of the ecm.

Bobby Suth

iTrader: (2)

change to carbureted take more. I have no engine harness or adapters. Tuneperf. U talking about the 2 connectors going up into the dash? Or the single one. Wire colors and pin? The 100 comes through the firewall by brake booster right!?

Tuned Performance

iTrader: (92)

There might be differences in both locations. This unfortunately this doesn't show 88. hopefully someone has c100 and c207 so you can compare the two.
www.austinthirdgen.org/?pid=19

check for power at the ecm with the key on pin a6 a pink/black wire.

Bobby Suth

iTrader: (2)

No power to 6a pink/black

Tuned Performance

iTrader: (92)

Check c207 pink/blk there might be a difference here.
c207 is the connector next to the ecm.

Bobby Suth

iTrader: (2)

207 the double connector that goes up behind the dash

Tuned Performance

iTrader: (92)

It’s a double connector that’s hooked to the ecm wiring.
do you have interior lights working ?

Bobby Suth

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I haven't had any lights come on. Most of the interior is out. Trying to get it running and haven't looked into headlights or any of that stuff. I did check the wiring at the starter. Two in line fuses were cut out and spliced together. The wiring all has 12v on each side of fuses and or splices. It will turn over with the ignition switch. I do have fuel pump working. I will check the c207 wire tomorrow.

Tuned Performance

iTrader: (92)

Sorry I should had to read your thread again. With no power at the fuse box you might have c100 differences in your two harnesses.

Bobby Suth

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The harness came out of a 88 model Camaro. I know that doesn't mean that is what it is. I think my trouble is the fuse box or wiring in that area. My 88 and 89 Firebirds both have a blade fuse in a big pink to pink/white I think are the colors. that I can not find in Camaro. And Po cut and spliced stuff. I will compare the two harness

Bobby Suth

iTrader: (2)

I do have power to some of the fuse box. The pink wire to the post for lights crank and a few other things are hot with key off. Big pink wire engine side of fire wall is hot just before it goes into the connector. So at the fuse box some pink hot some not. Should the pink wire to the post on back side of box for ECM fuse be hot at all times? I forgot to check it with key on.. fuel injector post line in had no power with key off either. Basically left side is dead. I'm going to disconnect and reconnect the harness and see if it helps. Next I guess I will have to drop the dash.

Bobby Suth

iTrader: (2)

Maybe disconnect the ECM and firewall connector and put voltage in fusebox. Then I can test at 6a and engine side of firewall

Bobby Suth

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Here's what I've learned. The big pink wire on engine side of c100 has no power from battery. I've got the connector apart at this time. The pink wire pin number on wire shamanic off austinthiirdgen is f4. Now when I take o jump wire to the fuse box and hook it up to the hot post for the ECM, gauge, I have 12volts to f4 f5. Also have 8 vats to e5 and 5volts to pins c6 and a4. Is f4 supposed to be hot from battery going to fuse box.or does it get power from the fuse box?

Tuned Performance

iTrader: (92)

F4 comes from the ignition switch.

Bobby Suth

iTrader: (2)

Does not get hot in run key on. Bad ground or blown fuse behind dash?

Tuned Performance

iTrader: (92)

Do you have a service manual yet ?
you might have to drop the column and check the ignition switch.

Tuned Performance

iTrader: (92)

Here’s a 92 schematic looks like there is a splice and the ignition switch controls injectors and turn signals.
http://www.austinthirdgen.org/mkport...stribution.jpg

Bobby Suth

iTrader: (2)

Ok. I just don't get what all happens when I turn the key to start. Power comes into fuse box through the firewall c100 big red wire.bto get there does it go to the starter first from the battery? Power at fuse box ignition or crank. How does the ignition key open the circuit to power the ECM pins and injectors in the fuse box? Is it by grounding or what? The motor turns over and fuel pump works but turning the key on dose no power ECM or coil or injectors. Unless I run a direct wire. Also should the f5 pin have 12v? I'm trying not to take the dash out. Looks like I'm out of options.

Bobby Suth

iTrader: (2)

The s164 I/p harness, near fuse box may be the problem spot. Looks like it is the one place that has all my non working lines and the ignition switch. Thanks very much. I will check that connector tomorrow.

Bobby Suth

iTrader: (2)

Does current actually go through the ignition switch? What I'm asking is can a bad switch cause my trouble?

Bobby Suth

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sorry! I never saw this post!😂 Guess it came in while I was working on a post.

92RS-HeritageEd

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Bobby Suth

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Thank you very much. Another question. Where are ckt 340 and 439? I have a sheet list of connectors from c00 to s218.: tells me location and how many cavities. These are not on the list. I wish I could get a service manual. Anyone take checks anymore?

92RS-HeritageEd

iTrader: (2)

CKT340 = Orange Wire - Pins C16 & B1 of ECM (Battery 12V)
CKT439 = Pink/Blk Wire - Pin A6 of ECM (Ignition Feed)

Bobby Suth

iTrader: (2)

Power to both 340 wire. 439 nothing. Just wondering. I had the ECM disconnected from the harness in one test and no lights on or ignition switch. When I started to connect the ground to the battery there's a small spark like there's something on in the car. Is this normal?

92RS-HeritageEd

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When I connect the ground to the battery there's a small spark. I notice it a little more when say... the door is open while i'm connecting it.

Bobby Suth

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Keep in mind some people have a wrong impression of what different parts of the car are called. I thought the ignition switch was the ignition key cylinder.. that's why I couldn't figure out how power went through it. Went to parts store and they pulled up a switch and I was surprised to see what it displayed. I have a few laying around I can try at no cost.

Bobby Suth

iTrader: (2)

Switch looks a little fried. By the way, the two 340 pins had 12v even with key off.

92RS-HeritageEd

iTrader: (2)

Those two are battery constant my friend...

Bobby Suth

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I ground to body and tested with only the very low reading.. I'm going to replace the switch now anyway..them two hot wires come off the fuse box? If they do, which fuses? I will look over the previous post for the answer Incase I missed the answer. I do have power to the engine side of firewall c100 on a4 pin. Right side of box hot. Lights and such. I think I have a fried in 2 wire or two. Looks like dash is coming out next.

Bobby Suth

iTrader: (2)

Update. First I would like to thank all for your help. I put a lot of time in and parts I've had laying around. The problem was that one of the previous owner had taken a major fuse out and burned out the ignition switch. I changed engine harness. Steering column from non tilt to tilt. I had a good switch for it and I like them better to. Checked the dash wiring out and installed it into a dash out of a 86 Camaro that was factory a/c. Changed the heater box while dash was out. It started!!😊