C4 NO START. Testing and bypassing the Starter and VATS Starter Enable Relay on a 1987 C4 Corvette

1987 Chevy Corvette Restoration: Episode 14 - Season 2 Episode 4:

Is your no start issue with the VATS or the starter? How to test and bypass the VATS Starter Enable Relay on a C4 Corvette

The C4 won't start, and I need to figure out if it's the starter or something else. We go into a deep dive of the VATS Decoder to find the problem.

00:00- 1:19 Intro
1:20 - 5:44 Test fit stock radio and get it ready
5:46- 7:28 C4 no start
7:29 - 9:59 Diagnose no start issue
10:00- 13:49 How the starting system works in a 1987 Corvette C4
13:50 - 17:41 How to remove C4 Dash Bezels and get behind Information Center
17:42- 21:25 Remove clip on Starter Enable Relay and install bypass
21:26 -21:59 How to Bypass the Starter Enable Relay on a C4
22:00- 24:52 How the VATS Decoder works on a C4
24:53 - 25:30 Wrapping up the bypass
25:31- 26:07 Outro

[pownubn]

Well you just saved me. I replaced the vatts with the bypass module. Ran for years. Than let it sit for years after it stopped running. I never came across this video after doing tons of research. I just did it and it started again. Huge props bro🤘👍

[dciaffa]

Your video on the half shaft u-joints helped me a lot.
I used a long furniture clamp to pull everything back on reassembly -this worked nicely.

[law]

Thank you for the great information in a very well presented manner
WELL DONE SIR!!!!
My 87 thanks you

[JackAtLDM]

Same problem with my 89...Same solution! Saved my Vette - thx Jerr!!!

[tiffanie]

Lmao! Thank you wish I would have seen this first, before the ridiculous amount of trial and error! Hopefully she will start! 😊

[edwardburke]

Use your bracket from old radio…. the sides of radio…..straight to the new one fits perfectly

[emymikeguillen]

Hi
I have a question
Instead of bypass your starter enable relay
Would it been better to replace that starter enable that was defective

[TheBorderHoppr]

Where can i get that spade connector tool???

[BigWillAuto]

when you hooked up that starter switch did you have the VATS pellet key in the ignition in run position ?

[edgardomagana]

Hi, hopefully you can help? I just got 1990 C4, but the owner lost the key. I got the new key at the Dealership with no chip and bought a bypass for the vats. But unfortunately I forgot to disconnect the battery first and my dashboard went out. Do you know that fuse or fusible link is??

[frankevanega]

What was the final solution to the intermittent starting?

[robertjenkins]

So if your problem lies within the tumbler in the ignition will doing this bypass the relay help?

[rickhayes]

What happens if you remove the fuse right there beside that relay to the VAT system

[Crashklein]

Hello, I need some help. I bought a 1988 Corvette convertible manual Trans that has been sitting outside for a while, not running. I found Mouse nests under dash top near gray VATs module. No wires chewed that I can spot. I have no way to speak with a prior owner. The car was rigged with a separate wire going to starter solenoid so it could be touched to battery and would turn over. I turned the ignition on with the key, dash lights came on then I turned motor over with jump wire. I got no spark and no sound from injectors. I unrigged jump wire, I bought all 15 resistors and tried them all 4 minutes apart to bypass VATS. I have the clutch safety switch bypassed and the Vats start relay bypassed. Still nothing when I turn the key. I have cleaned all grounds to the frame under the hood. Unplugged and cleaned every connector under the passenger side dash. I replaced Plugs, wires, dist cap, rotor, Ign control module. I have some fuses with no power going in to them: HTD MIR, Inst-LPS, FR or FP( I cant read it but it is on the bottom row far right). In my convenience center, I have no power to the fuse labled: Cinj/clu. Can you please give me an idea of what to try next?

[Chances_garage]

On my 90 the fuel pump turns on but I think the injectors won't pulse

[billieandrews]

I did a resistor key by pass. My fuel pump came on so does that mean I solved the iss issue but still no crank

[jcrocker]

I have a 91 c4 and having the intermittent no start. New starter, have the vats bypass. No one can figure it out. I'm leaning to the neutral safety switch by need to know how to bypass it

[paulparnitzke]

Did the engine turn over before this or did it just not start

[edwardburke]

As for the no start no crank either battery is dead or starter solenoid is bad and you need starter…. Fast fix

[dannywhite]

You didn't do anything on car starting issues. F- grade